Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/plat-omap/mcbsp.c |
| 3 | * |
| 4 | * Copyright (C) 2004 Nokia Corporation |
| 5 | * Author: Samuel Ortiz <samuel.ortiz@nokia.com> |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * Multichannel mode not supported. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/device.h> |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 18 | #include <linux/platform_device.h> |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 19 | #include <linux/wait.h> |
| 20 | #include <linux/completion.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/err.h> |
Russell King | f8ce254 | 2006-01-07 16:15:52 +0000 | [diff] [blame] | 23 | #include <linux/clk.h> |
Tony Lindgren | 04fbf6a | 2007-02-12 10:50:53 -0800 | [diff] [blame] | 24 | #include <linux/delay.h> |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 25 | #include <linux/io.h> |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 26 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 27 | #include <mach/dma.h> |
| 28 | #include <mach/mcbsp.h> |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 29 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 30 | struct omap_mcbsp **mcbsp_ptr; |
| 31 | int omap_mcbsp_count; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 32 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 33 | void omap_mcbsp_write(void __iomem *io_base, u16 reg, u32 val) |
| 34 | { |
| 35 | if (cpu_class_is_omap1() || cpu_is_omap2420()) |
| 36 | __raw_writew((u16)val, io_base + reg); |
| 37 | else |
| 38 | __raw_writel(val, io_base + reg); |
| 39 | } |
| 40 | |
| 41 | int omap_mcbsp_read(void __iomem *io_base, u16 reg) |
| 42 | { |
| 43 | if (cpu_class_is_omap1() || cpu_is_omap2420()) |
| 44 | return __raw_readw(io_base + reg); |
| 45 | else |
| 46 | return __raw_readl(io_base + reg); |
| 47 | } |
| 48 | |
| 49 | #define OMAP_MCBSP_READ(base, reg) \ |
| 50 | omap_mcbsp_read(base, OMAP_MCBSP_REG_##reg) |
| 51 | #define OMAP_MCBSP_WRITE(base, reg, val) \ |
| 52 | omap_mcbsp_write(base, OMAP_MCBSP_REG_##reg, val) |
| 53 | |
| 54 | #define omap_mcbsp_check_valid_id(id) (id < omap_mcbsp_count) |
| 55 | #define id_to_mcbsp_ptr(id) mcbsp_ptr[id]; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 56 | |
| 57 | static void omap_mcbsp_dump_reg(u8 id) |
| 58 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 59 | struct omap_mcbsp *mcbsp = id_to_mcbsp_ptr(id); |
| 60 | |
| 61 | dev_dbg(mcbsp->dev, "**** McBSP%d regs ****\n", mcbsp->id); |
| 62 | dev_dbg(mcbsp->dev, "DRR2: 0x%04x\n", |
| 63 | OMAP_MCBSP_READ(mcbsp->io_base, DRR2)); |
| 64 | dev_dbg(mcbsp->dev, "DRR1: 0x%04x\n", |
| 65 | OMAP_MCBSP_READ(mcbsp->io_base, DRR1)); |
| 66 | dev_dbg(mcbsp->dev, "DXR2: 0x%04x\n", |
| 67 | OMAP_MCBSP_READ(mcbsp->io_base, DXR2)); |
| 68 | dev_dbg(mcbsp->dev, "DXR1: 0x%04x\n", |
| 69 | OMAP_MCBSP_READ(mcbsp->io_base, DXR1)); |
| 70 | dev_dbg(mcbsp->dev, "SPCR2: 0x%04x\n", |
| 71 | OMAP_MCBSP_READ(mcbsp->io_base, SPCR2)); |
| 72 | dev_dbg(mcbsp->dev, "SPCR1: 0x%04x\n", |
| 73 | OMAP_MCBSP_READ(mcbsp->io_base, SPCR1)); |
| 74 | dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n", |
| 75 | OMAP_MCBSP_READ(mcbsp->io_base, RCR2)); |
| 76 | dev_dbg(mcbsp->dev, "RCR1: 0x%04x\n", |
| 77 | OMAP_MCBSP_READ(mcbsp->io_base, RCR1)); |
| 78 | dev_dbg(mcbsp->dev, "XCR2: 0x%04x\n", |
| 79 | OMAP_MCBSP_READ(mcbsp->io_base, XCR2)); |
| 80 | dev_dbg(mcbsp->dev, "XCR1: 0x%04x\n", |
| 81 | OMAP_MCBSP_READ(mcbsp->io_base, XCR1)); |
| 82 | dev_dbg(mcbsp->dev, "SRGR2: 0x%04x\n", |
| 83 | OMAP_MCBSP_READ(mcbsp->io_base, SRGR2)); |
| 84 | dev_dbg(mcbsp->dev, "SRGR1: 0x%04x\n", |
| 85 | OMAP_MCBSP_READ(mcbsp->io_base, SRGR1)); |
| 86 | dev_dbg(mcbsp->dev, "PCR0: 0x%04x\n", |
| 87 | OMAP_MCBSP_READ(mcbsp->io_base, PCR0)); |
| 88 | dev_dbg(mcbsp->dev, "***********************\n"); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 89 | } |
| 90 | |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 91 | static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 92 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 93 | struct omap_mcbsp *mcbsp_tx = dev_id; |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 94 | u16 irqst_spcr2; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 95 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 96 | irqst_spcr2 = OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2); |
| 97 | dev_dbg(mcbsp_tx->dev, "TX IRQ callback : 0x%x\n", irqst_spcr2); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 98 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 99 | if (irqst_spcr2 & XSYNC_ERR) { |
| 100 | dev_err(mcbsp_tx->dev, "TX Frame Sync Error! : 0x%x\n", |
| 101 | irqst_spcr2); |
| 102 | /* Writing zero to XSYNC_ERR clears the IRQ */ |
| 103 | OMAP_MCBSP_WRITE(mcbsp_tx->io_base, SPCR2, |
| 104 | irqst_spcr2 & ~(XSYNC_ERR)); |
| 105 | } else { |
| 106 | complete(&mcbsp_tx->tx_irq_completion); |
| 107 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 108 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 109 | return IRQ_HANDLED; |
| 110 | } |
| 111 | |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 112 | static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 113 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 114 | struct omap_mcbsp *mcbsp_rx = dev_id; |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 115 | u16 irqst_spcr1; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 116 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 117 | irqst_spcr1 = OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR1); |
| 118 | dev_dbg(mcbsp_rx->dev, "RX IRQ callback : 0x%x\n", irqst_spcr1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 119 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 120 | if (irqst_spcr1 & RSYNC_ERR) { |
| 121 | dev_err(mcbsp_rx->dev, "RX Frame Sync Error! : 0x%x\n", |
| 122 | irqst_spcr1); |
| 123 | /* Writing zero to RSYNC_ERR clears the IRQ */ |
| 124 | OMAP_MCBSP_WRITE(mcbsp_rx->io_base, SPCR1, |
| 125 | irqst_spcr1 & ~(RSYNC_ERR)); |
| 126 | } else { |
| 127 | complete(&mcbsp_rx->tx_irq_completion); |
| 128 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 129 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 130 | return IRQ_HANDLED; |
| 131 | } |
| 132 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 133 | static void omap_mcbsp_tx_dma_callback(int lch, u16 ch_status, void *data) |
| 134 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 135 | struct omap_mcbsp *mcbsp_dma_tx = data; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 136 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 137 | dev_dbg(mcbsp_dma_tx->dev, "TX DMA callback : 0x%x\n", |
| 138 | OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 139 | |
| 140 | /* We can free the channels */ |
| 141 | omap_free_dma(mcbsp_dma_tx->dma_tx_lch); |
| 142 | mcbsp_dma_tx->dma_tx_lch = -1; |
| 143 | |
| 144 | complete(&mcbsp_dma_tx->tx_dma_completion); |
| 145 | } |
| 146 | |
| 147 | static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data) |
| 148 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 149 | struct omap_mcbsp *mcbsp_dma_rx = data; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 150 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 151 | dev_dbg(mcbsp_dma_rx->dev, "RX DMA callback : 0x%x\n", |
| 152 | OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 153 | |
| 154 | /* We can free the channels */ |
| 155 | omap_free_dma(mcbsp_dma_rx->dma_rx_lch); |
| 156 | mcbsp_dma_rx->dma_rx_lch = -1; |
| 157 | |
| 158 | complete(&mcbsp_dma_rx->rx_dma_completion); |
| 159 | } |
| 160 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 161 | /* |
| 162 | * omap_mcbsp_config simply write a config to the |
| 163 | * appropriate McBSP. |
| 164 | * You either call this function or set the McBSP registers |
| 165 | * by yourself before calling omap_mcbsp_start(). |
| 166 | */ |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 167 | void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 168 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 169 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 170 | void __iomem *io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 171 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 172 | if (!omap_mcbsp_check_valid_id(id)) { |
| 173 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 174 | return; |
| 175 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 176 | mcbsp = id_to_mcbsp_ptr(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 177 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 178 | io_base = mcbsp->io_base; |
| 179 | dev_dbg(mcbsp->dev, "Configuring McBSP%d phys_base: 0x%08lx\n", |
| 180 | mcbsp->id, mcbsp->phys_base); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 181 | |
| 182 | /* We write the given config */ |
| 183 | OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2); |
| 184 | OMAP_MCBSP_WRITE(io_base, SPCR1, config->spcr1); |
| 185 | OMAP_MCBSP_WRITE(io_base, RCR2, config->rcr2); |
| 186 | OMAP_MCBSP_WRITE(io_base, RCR1, config->rcr1); |
| 187 | OMAP_MCBSP_WRITE(io_base, XCR2, config->xcr2); |
| 188 | OMAP_MCBSP_WRITE(io_base, XCR1, config->xcr1); |
| 189 | OMAP_MCBSP_WRITE(io_base, SRGR2, config->srgr2); |
| 190 | OMAP_MCBSP_WRITE(io_base, SRGR1, config->srgr1); |
| 191 | OMAP_MCBSP_WRITE(io_base, MCR2, config->mcr2); |
| 192 | OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1); |
| 193 | OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0); |
Syed Rafiuddin | a5b92cc | 2009-07-28 18:57:10 +0530 | [diff] [blame] | 194 | if (cpu_is_omap2430() || cpu_is_omap34xx() || cpu_is_omap44xx()) { |
Tony Lindgren | 3127f8f | 2009-01-15 13:09:54 +0200 | [diff] [blame] | 195 | OMAP_MCBSP_WRITE(io_base, XCCR, config->xccr); |
| 196 | OMAP_MCBSP_WRITE(io_base, RCCR, config->rccr); |
| 197 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 198 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 199 | EXPORT_SYMBOL(omap_mcbsp_config); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 200 | |
Eduardo Valentin | 7aa9ff5 | 2009-08-20 16:18:10 +0300 | [diff] [blame] | 201 | #ifdef CONFIG_ARCH_OMAP34XX |
| 202 | /* |
| 203 | * omap_mcbsp_set_tx_threshold configures how to deal |
| 204 | * with transmit threshold. the threshold value and handler can be |
| 205 | * configure in here. |
| 206 | */ |
| 207 | void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold) |
| 208 | { |
| 209 | struct omap_mcbsp *mcbsp; |
| 210 | void __iomem *io_base; |
| 211 | |
| 212 | if (!cpu_is_omap34xx()) |
| 213 | return; |
| 214 | |
| 215 | if (!omap_mcbsp_check_valid_id(id)) { |
| 216 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 217 | return; |
| 218 | } |
| 219 | mcbsp = id_to_mcbsp_ptr(id); |
| 220 | io_base = mcbsp->io_base; |
| 221 | |
| 222 | OMAP_MCBSP_WRITE(io_base, THRSH2, threshold); |
| 223 | } |
| 224 | EXPORT_SYMBOL(omap_mcbsp_set_tx_threshold); |
| 225 | |
| 226 | /* |
| 227 | * omap_mcbsp_set_rx_threshold configures how to deal |
| 228 | * with receive threshold. the threshold value and handler can be |
| 229 | * configure in here. |
| 230 | */ |
| 231 | void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold) |
| 232 | { |
| 233 | struct omap_mcbsp *mcbsp; |
| 234 | void __iomem *io_base; |
| 235 | |
| 236 | if (!cpu_is_omap34xx()) |
| 237 | return; |
| 238 | |
| 239 | if (!omap_mcbsp_check_valid_id(id)) { |
| 240 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 241 | return; |
| 242 | } |
| 243 | mcbsp = id_to_mcbsp_ptr(id); |
| 244 | io_base = mcbsp->io_base; |
| 245 | |
| 246 | OMAP_MCBSP_WRITE(io_base, THRSH1, threshold); |
| 247 | } |
| 248 | EXPORT_SYMBOL(omap_mcbsp_set_rx_threshold); |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 249 | |
| 250 | /* |
| 251 | * omap_mcbsp_get_max_tx_thres just return the current configured |
| 252 | * maximum threshold for transmission |
| 253 | */ |
| 254 | u16 omap_mcbsp_get_max_tx_threshold(unsigned int id) |
| 255 | { |
| 256 | struct omap_mcbsp *mcbsp; |
| 257 | |
| 258 | if (!omap_mcbsp_check_valid_id(id)) { |
| 259 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 260 | return -ENODEV; |
| 261 | } |
| 262 | mcbsp = id_to_mcbsp_ptr(id); |
| 263 | |
| 264 | return mcbsp->max_tx_thres; |
| 265 | } |
| 266 | EXPORT_SYMBOL(omap_mcbsp_get_max_tx_threshold); |
| 267 | |
| 268 | /* |
| 269 | * omap_mcbsp_get_max_rx_thres just return the current configured |
| 270 | * maximum threshold for reception |
| 271 | */ |
| 272 | u16 omap_mcbsp_get_max_rx_threshold(unsigned int id) |
| 273 | { |
| 274 | struct omap_mcbsp *mcbsp; |
| 275 | |
| 276 | if (!omap_mcbsp_check_valid_id(id)) { |
| 277 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 278 | return -ENODEV; |
| 279 | } |
| 280 | mcbsp = id_to_mcbsp_ptr(id); |
| 281 | |
| 282 | return mcbsp->max_rx_thres; |
| 283 | } |
| 284 | EXPORT_SYMBOL(omap_mcbsp_get_max_rx_threshold); |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 285 | |
| 286 | /* |
| 287 | * omap_mcbsp_get_dma_op_mode just return the current configured |
| 288 | * operating mode for the mcbsp channel |
| 289 | */ |
| 290 | int omap_mcbsp_get_dma_op_mode(unsigned int id) |
| 291 | { |
| 292 | struct omap_mcbsp *mcbsp; |
| 293 | int dma_op_mode; |
| 294 | |
| 295 | if (!omap_mcbsp_check_valid_id(id)) { |
| 296 | printk(KERN_ERR "%s: Invalid id (%u)\n", __func__, id + 1); |
| 297 | return -ENODEV; |
| 298 | } |
| 299 | mcbsp = id_to_mcbsp_ptr(id); |
| 300 | |
| 301 | spin_lock_irq(&mcbsp->lock); |
| 302 | dma_op_mode = mcbsp->dma_op_mode; |
| 303 | spin_unlock_irq(&mcbsp->lock); |
| 304 | |
| 305 | return dma_op_mode; |
| 306 | } |
| 307 | EXPORT_SYMBOL(omap_mcbsp_get_dma_op_mode); |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 308 | |
| 309 | static inline void omap34xx_mcbsp_request(struct omap_mcbsp *mcbsp) |
| 310 | { |
| 311 | /* |
| 312 | * Enable wakup behavior, smart idle and all wakeups |
| 313 | * REVISIT: some wakeups may be unnecessary |
| 314 | */ |
| 315 | if (cpu_is_omap34xx()) { |
| 316 | u16 syscon; |
| 317 | |
| 318 | syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON); |
Eero Nurkkala | 2ba93f8 | 2009-08-20 16:18:17 +0300 | [diff] [blame] | 319 | syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03)); |
Eduardo Valentin | d99a745 | 2009-08-20 16:18:18 +0300 | [diff] [blame] | 320 | |
| 321 | spin_lock_irq(&mcbsp->lock); |
Eero Nurkkala | fa3935b | 2009-08-20 16:18:19 +0300 | [diff] [blame] | 322 | if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) { |
| 323 | syscon |= (ENAWAKEUP | SIDLEMODE(0x02) | |
| 324 | CLOCKACTIVITY(0x02)); |
| 325 | OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, |
| 326 | XRDYEN | RRDYEN); |
| 327 | } else { |
Eduardo Valentin | d99a745 | 2009-08-20 16:18:18 +0300 | [diff] [blame] | 328 | syscon |= SIDLEMODE(0x01); |
Eero Nurkkala | fa3935b | 2009-08-20 16:18:19 +0300 | [diff] [blame] | 329 | } |
Eduardo Valentin | d99a745 | 2009-08-20 16:18:18 +0300 | [diff] [blame] | 330 | spin_unlock_irq(&mcbsp->lock); |
| 331 | |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 332 | OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon); |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 333 | } |
| 334 | } |
| 335 | |
| 336 | static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp) |
| 337 | { |
| 338 | /* |
| 339 | * Disable wakup behavior, smart idle and all wakeups |
| 340 | */ |
| 341 | if (cpu_is_omap34xx()) { |
| 342 | u16 syscon; |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 343 | |
| 344 | syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON); |
Eero Nurkkala | 2ba93f8 | 2009-08-20 16:18:17 +0300 | [diff] [blame] | 345 | syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03)); |
Eero Nurkkala | 72cc6d7 | 2009-08-20 16:18:20 +0300 | [diff] [blame] | 346 | /* |
| 347 | * HW bug workaround - If no_idle mode is taken, we need to |
| 348 | * go to smart_idle before going to always_idle, or the |
| 349 | * device will not hit retention anymore. |
| 350 | */ |
| 351 | syscon |= SIDLEMODE(0x02); |
| 352 | OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon); |
| 353 | |
| 354 | syscon &= ~(SIDLEMODE(0x03)); |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 355 | OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon); |
| 356 | |
Eduardo Valentin | d9a9b3f | 2009-08-20 16:18:16 +0300 | [diff] [blame] | 357 | OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, 0); |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 358 | } |
| 359 | } |
| 360 | #else |
| 361 | static inline void omap34xx_mcbsp_request(struct omap_mcbsp *mcbsp) {} |
| 362 | static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp) {} |
Eduardo Valentin | 7aa9ff5 | 2009-08-20 16:18:10 +0300 | [diff] [blame] | 363 | #endif |
| 364 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 365 | /* |
| 366 | * We can choose between IRQ based or polled IO. |
| 367 | * This needs to be called before omap_mcbsp_request(). |
| 368 | */ |
| 369 | int omap_mcbsp_set_io_type(unsigned int id, omap_mcbsp_io_type_t io_type) |
| 370 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 371 | struct omap_mcbsp *mcbsp; |
| 372 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 373 | if (!omap_mcbsp_check_valid_id(id)) { |
| 374 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 375 | return -ENODEV; |
| 376 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 377 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 378 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 379 | spin_lock(&mcbsp->lock); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 380 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 381 | if (!mcbsp->free) { |
| 382 | dev_err(mcbsp->dev, "McBSP%d is currently in use\n", |
| 383 | mcbsp->id); |
| 384 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 385 | return -EINVAL; |
| 386 | } |
| 387 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 388 | mcbsp->io_type = io_type; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 389 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 390 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 391 | |
| 392 | return 0; |
| 393 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 394 | EXPORT_SYMBOL(omap_mcbsp_set_io_type); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 395 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 396 | int omap_mcbsp_request(unsigned int id) |
| 397 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 398 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 399 | int err; |
| 400 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 401 | if (!omap_mcbsp_check_valid_id(id)) { |
| 402 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 403 | return -ENODEV; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 404 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 405 | mcbsp = id_to_mcbsp_ptr(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 406 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 407 | spin_lock(&mcbsp->lock); |
| 408 | if (!mcbsp->free) { |
| 409 | dev_err(mcbsp->dev, "McBSP%d is currently in use\n", |
| 410 | mcbsp->id); |
| 411 | spin_unlock(&mcbsp->lock); |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 412 | return -EBUSY; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 413 | } |
| 414 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 415 | mcbsp->free = 0; |
| 416 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 417 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 418 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request) |
| 419 | mcbsp->pdata->ops->request(id); |
| 420 | |
| 421 | clk_enable(mcbsp->iclk); |
| 422 | clk_enable(mcbsp->fclk); |
| 423 | |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 424 | /* Do procedure specific to omap34xx arch, if applicable */ |
| 425 | omap34xx_mcbsp_request(mcbsp); |
| 426 | |
Jarkko Nikula | 5a07055 | 2008-10-08 10:01:41 +0300 | [diff] [blame] | 427 | /* |
| 428 | * Make sure that transmitter, receiver and sample-rate generator are |
| 429 | * not running before activating IRQs. |
| 430 | */ |
| 431 | OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR1, 0); |
| 432 | OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR2, 0); |
| 433 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 434 | if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 435 | /* We need to get IRQs here */ |
Jarkko Nikula | 5a07055 | 2008-10-08 10:01:41 +0300 | [diff] [blame] | 436 | init_completion(&mcbsp->tx_irq_completion); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 437 | err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, |
| 438 | 0, "McBSP", (void *)mcbsp); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 439 | if (err != 0) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 440 | dev_err(mcbsp->dev, "Unable to request TX IRQ %d " |
| 441 | "for McBSP%d\n", mcbsp->tx_irq, |
| 442 | mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 443 | return err; |
| 444 | } |
| 445 | |
Jarkko Nikula | 5a07055 | 2008-10-08 10:01:41 +0300 | [diff] [blame] | 446 | init_completion(&mcbsp->rx_irq_completion); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 447 | err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, |
| 448 | 0, "McBSP", (void *)mcbsp); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 449 | if (err != 0) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 450 | dev_err(mcbsp->dev, "Unable to request RX IRQ %d " |
| 451 | "for McBSP%d\n", mcbsp->rx_irq, |
| 452 | mcbsp->id); |
| 453 | free_irq(mcbsp->tx_irq, (void *)mcbsp); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 454 | return err; |
| 455 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 456 | } |
| 457 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 458 | return 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 459 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 460 | EXPORT_SYMBOL(omap_mcbsp_request); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 461 | |
| 462 | void omap_mcbsp_free(unsigned int id) |
| 463 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 464 | struct omap_mcbsp *mcbsp; |
| 465 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 466 | if (!omap_mcbsp_check_valid_id(id)) { |
| 467 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 468 | return; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 469 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 470 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 471 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 472 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free) |
| 473 | mcbsp->pdata->ops->free(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 474 | |
Eero Nurkkala | 2122fdc | 2009-08-20 16:18:15 +0300 | [diff] [blame] | 475 | /* Do procedure specific to omap34xx arch, if applicable */ |
| 476 | omap34xx_mcbsp_free(mcbsp); |
| 477 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 478 | clk_disable(mcbsp->fclk); |
| 479 | clk_disable(mcbsp->iclk); |
| 480 | |
| 481 | if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { |
| 482 | /* Free IRQs */ |
| 483 | free_irq(mcbsp->rx_irq, (void *)mcbsp); |
| 484 | free_irq(mcbsp->tx_irq, (void *)mcbsp); |
| 485 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 486 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 487 | spin_lock(&mcbsp->lock); |
| 488 | if (mcbsp->free) { |
| 489 | dev_err(mcbsp->dev, "McBSP%d was not reserved\n", |
| 490 | mcbsp->id); |
| 491 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 492 | return; |
| 493 | } |
| 494 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 495 | mcbsp->free = 1; |
| 496 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 497 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 498 | EXPORT_SYMBOL(omap_mcbsp_free); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 499 | |
| 500 | /* |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 501 | * Here we start the McBSP, by enabling transmitter, receiver or both. |
| 502 | * If no transmitter or receiver is active prior calling, then sample-rate |
| 503 | * generator and frame sync are started. |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 504 | */ |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 505 | void omap_mcbsp_start(unsigned int id, int tx, int rx) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 506 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 507 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 508 | void __iomem *io_base; |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 509 | int idle; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 510 | u16 w; |
| 511 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 512 | if (!omap_mcbsp_check_valid_id(id)) { |
| 513 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 514 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 515 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 516 | mcbsp = id_to_mcbsp_ptr(id); |
| 517 | io_base = mcbsp->io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 518 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 519 | mcbsp->rx_word_length = (OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7; |
| 520 | mcbsp->tx_word_length = (OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 521 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 522 | idle = !((OMAP_MCBSP_READ(io_base, SPCR2) | |
| 523 | OMAP_MCBSP_READ(io_base, SPCR1)) & 1); |
| 524 | |
| 525 | if (idle) { |
| 526 | /* Start the sample generator */ |
| 527 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
| 528 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6)); |
| 529 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 530 | |
| 531 | /* Enable transmitter and receiver */ |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 532 | tx &= 1; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 533 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 534 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | tx); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 535 | |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 536 | rx &= 1; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 537 | w = OMAP_MCBSP_READ(io_base, SPCR1); |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 538 | OMAP_MCBSP_WRITE(io_base, SPCR1, w | rx); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 539 | |
Eduardo Valentin | 44a6311 | 2009-08-20 16:18:09 +0300 | [diff] [blame] | 540 | /* |
| 541 | * Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec |
| 542 | * REVISIT: 100us may give enough time for two CLKSRG, however |
| 543 | * due to some unknown PM related, clock gating etc. reason it |
| 544 | * is now at 500us. |
| 545 | */ |
| 546 | udelay(500); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 547 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 548 | if (idle) { |
| 549 | /* Start frame sync */ |
| 550 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
| 551 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7)); |
| 552 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 553 | |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 554 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { |
| 555 | /* Release the transmitter and receiver */ |
| 556 | w = OMAP_MCBSP_READ(io_base, XCCR); |
| 557 | w &= ~(tx ? XDISABLE : 0); |
| 558 | OMAP_MCBSP_WRITE(io_base, XCCR, w); |
| 559 | w = OMAP_MCBSP_READ(io_base, RCCR); |
| 560 | w &= ~(rx ? RDISABLE : 0); |
| 561 | OMAP_MCBSP_WRITE(io_base, RCCR, w); |
| 562 | } |
| 563 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 564 | /* Dump McBSP Regs */ |
| 565 | omap_mcbsp_dump_reg(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 566 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 567 | EXPORT_SYMBOL(omap_mcbsp_start); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 568 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 569 | void omap_mcbsp_stop(unsigned int id, int tx, int rx) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 570 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 571 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 572 | void __iomem *io_base; |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 573 | int idle; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 574 | u16 w; |
| 575 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 576 | if (!omap_mcbsp_check_valid_id(id)) { |
| 577 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 578 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 579 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 580 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 581 | mcbsp = id_to_mcbsp_ptr(id); |
| 582 | io_base = mcbsp->io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 583 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 584 | /* Reset transmitter */ |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 585 | tx &= 1; |
| 586 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { |
| 587 | w = OMAP_MCBSP_READ(io_base, XCCR); |
| 588 | w |= (tx ? XDISABLE : 0); |
| 589 | OMAP_MCBSP_WRITE(io_base, XCCR, w); |
| 590 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 591 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 592 | OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~tx); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 593 | |
| 594 | /* Reset receiver */ |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 595 | rx &= 1; |
| 596 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { |
| 597 | w = OMAP_MCBSP_READ(io_base, RCCR); |
Jarkko Nikula | a93d4ed | 2009-10-14 09:56:35 -0700 | [diff] [blame] | 598 | w |= (rx ? RDISABLE : 0); |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 599 | OMAP_MCBSP_WRITE(io_base, RCCR, w); |
| 600 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 601 | w = OMAP_MCBSP_READ(io_base, SPCR1); |
Jarkko Nikula | d09a2af | 2009-08-23 12:24:27 +0300 | [diff] [blame] | 602 | OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~rx); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 603 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 604 | idle = !((OMAP_MCBSP_READ(io_base, SPCR2) | |
| 605 | OMAP_MCBSP_READ(io_base, SPCR1)) & 1); |
| 606 | |
| 607 | if (idle) { |
| 608 | /* Reset the sample rate generator */ |
| 609 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
| 610 | OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6)); |
| 611 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 612 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 613 | EXPORT_SYMBOL(omap_mcbsp_stop); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 614 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 615 | /* polled mcbsp i/o operations */ |
| 616 | int omap_mcbsp_pollwrite(unsigned int id, u16 buf) |
| 617 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 618 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 619 | void __iomem *base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 620 | |
| 621 | if (!omap_mcbsp_check_valid_id(id)) { |
| 622 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 623 | return -ENODEV; |
| 624 | } |
| 625 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 626 | mcbsp = id_to_mcbsp_ptr(id); |
| 627 | base = mcbsp->io_base; |
| 628 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 629 | writew(buf, base + OMAP_MCBSP_REG_DXR1); |
| 630 | /* if frame sync error - clear the error */ |
| 631 | if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) { |
| 632 | /* clear error */ |
| 633 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR), |
| 634 | base + OMAP_MCBSP_REG_SPCR2); |
| 635 | /* resend */ |
| 636 | return -1; |
| 637 | } else { |
| 638 | /* wait for transmit confirmation */ |
| 639 | int attemps = 0; |
| 640 | while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) { |
| 641 | if (attemps++ > 1000) { |
| 642 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) & |
| 643 | (~XRST), |
| 644 | base + OMAP_MCBSP_REG_SPCR2); |
| 645 | udelay(10); |
| 646 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) | |
| 647 | (XRST), |
| 648 | base + OMAP_MCBSP_REG_SPCR2); |
| 649 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 650 | dev_err(mcbsp->dev, "Could not write to" |
| 651 | " McBSP%d Register\n", mcbsp->id); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 652 | return -2; |
| 653 | } |
| 654 | } |
| 655 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 656 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 657 | return 0; |
| 658 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 659 | EXPORT_SYMBOL(omap_mcbsp_pollwrite); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 660 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 661 | int omap_mcbsp_pollread(unsigned int id, u16 *buf) |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 662 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 663 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 664 | void __iomem *base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 665 | |
| 666 | if (!omap_mcbsp_check_valid_id(id)) { |
| 667 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 668 | return -ENODEV; |
| 669 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 670 | mcbsp = id_to_mcbsp_ptr(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 671 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 672 | base = mcbsp->io_base; |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 673 | /* if frame sync error - clear the error */ |
| 674 | if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) { |
| 675 | /* clear error */ |
| 676 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR), |
| 677 | base + OMAP_MCBSP_REG_SPCR1); |
| 678 | /* resend */ |
| 679 | return -1; |
| 680 | } else { |
| 681 | /* wait for recieve confirmation */ |
| 682 | int attemps = 0; |
| 683 | while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) { |
| 684 | if (attemps++ > 1000) { |
| 685 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) & |
| 686 | (~RRST), |
| 687 | base + OMAP_MCBSP_REG_SPCR1); |
| 688 | udelay(10); |
| 689 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) | |
| 690 | (RRST), |
| 691 | base + OMAP_MCBSP_REG_SPCR1); |
| 692 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 693 | dev_err(mcbsp->dev, "Could not read from" |
| 694 | " McBSP%d Register\n", mcbsp->id); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 695 | return -2; |
| 696 | } |
| 697 | } |
| 698 | } |
| 699 | *buf = readw(base + OMAP_MCBSP_REG_DRR1); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 700 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 701 | return 0; |
| 702 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 703 | EXPORT_SYMBOL(omap_mcbsp_pollread); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 704 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 705 | /* |
| 706 | * IRQ based word transmission. |
| 707 | */ |
| 708 | void omap_mcbsp_xmit_word(unsigned int id, u32 word) |
| 709 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 710 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 711 | void __iomem *io_base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 712 | omap_mcbsp_word_length word_length; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 713 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 714 | if (!omap_mcbsp_check_valid_id(id)) { |
| 715 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 716 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 717 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 718 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 719 | mcbsp = id_to_mcbsp_ptr(id); |
| 720 | io_base = mcbsp->io_base; |
| 721 | word_length = mcbsp->tx_word_length; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 722 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 723 | wait_for_completion(&mcbsp->tx_irq_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 724 | |
| 725 | if (word_length > OMAP_MCBSP_WORD_16) |
| 726 | OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16); |
| 727 | OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff); |
| 728 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 729 | EXPORT_SYMBOL(omap_mcbsp_xmit_word); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 730 | |
| 731 | u32 omap_mcbsp_recv_word(unsigned int id) |
| 732 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 733 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 734 | void __iomem *io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 735 | u16 word_lsb, word_msb = 0; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 736 | omap_mcbsp_word_length word_length; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 737 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 738 | if (!omap_mcbsp_check_valid_id(id)) { |
| 739 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 740 | return -ENODEV; |
| 741 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 742 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 743 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 744 | word_length = mcbsp->rx_word_length; |
| 745 | io_base = mcbsp->io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 746 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 747 | wait_for_completion(&mcbsp->rx_irq_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 748 | |
| 749 | if (word_length > OMAP_MCBSP_WORD_16) |
| 750 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); |
| 751 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); |
| 752 | |
| 753 | return (word_lsb | (word_msb << 16)); |
| 754 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 755 | EXPORT_SYMBOL(omap_mcbsp_recv_word); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 756 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 757 | int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word) |
| 758 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 759 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 760 | void __iomem *io_base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 761 | omap_mcbsp_word_length tx_word_length; |
| 762 | omap_mcbsp_word_length rx_word_length; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 763 | u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0; |
| 764 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 765 | if (!omap_mcbsp_check_valid_id(id)) { |
| 766 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 767 | return -ENODEV; |
| 768 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 769 | mcbsp = id_to_mcbsp_ptr(id); |
| 770 | io_base = mcbsp->io_base; |
| 771 | tx_word_length = mcbsp->tx_word_length; |
| 772 | rx_word_length = mcbsp->rx_word_length; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 773 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 774 | if (tx_word_length != rx_word_length) |
| 775 | return -EINVAL; |
| 776 | |
| 777 | /* First we wait for the transmitter to be ready */ |
| 778 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 779 | while (!(spcr2 & XRDY)) { |
| 780 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 781 | if (attempts++ > 1000) { |
| 782 | /* We must reset the transmitter */ |
| 783 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 & (~XRST)); |
| 784 | udelay(10); |
| 785 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST); |
| 786 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 787 | dev_err(mcbsp->dev, "McBSP%d transmitter not " |
| 788 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 789 | return -EAGAIN; |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | /* Now we can push the data */ |
| 794 | if (tx_word_length > OMAP_MCBSP_WORD_16) |
| 795 | OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16); |
| 796 | OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff); |
| 797 | |
| 798 | /* We wait for the receiver to be ready */ |
| 799 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 800 | while (!(spcr1 & RRDY)) { |
| 801 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 802 | if (attempts++ > 1000) { |
| 803 | /* We must reset the receiver */ |
| 804 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 & (~RRST)); |
| 805 | udelay(10); |
| 806 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST); |
| 807 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 808 | dev_err(mcbsp->dev, "McBSP%d receiver not " |
| 809 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 810 | return -EAGAIN; |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | /* Receiver is ready, let's read the dummy data */ |
| 815 | if (rx_word_length > OMAP_MCBSP_WORD_16) |
| 816 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); |
| 817 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); |
| 818 | |
| 819 | return 0; |
| 820 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 821 | EXPORT_SYMBOL(omap_mcbsp_spi_master_xmit_word_poll); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 822 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 823 | int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word) |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 824 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 825 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 826 | u32 clock_word = 0; |
| 827 | void __iomem *io_base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 828 | omap_mcbsp_word_length tx_word_length; |
| 829 | omap_mcbsp_word_length rx_word_length; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 830 | u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0; |
| 831 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 832 | if (!omap_mcbsp_check_valid_id(id)) { |
| 833 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 834 | return -ENODEV; |
| 835 | } |
| 836 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 837 | mcbsp = id_to_mcbsp_ptr(id); |
| 838 | io_base = mcbsp->io_base; |
| 839 | |
| 840 | tx_word_length = mcbsp->tx_word_length; |
| 841 | rx_word_length = mcbsp->rx_word_length; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 842 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 843 | if (tx_word_length != rx_word_length) |
| 844 | return -EINVAL; |
| 845 | |
| 846 | /* First we wait for the transmitter to be ready */ |
| 847 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 848 | while (!(spcr2 & XRDY)) { |
| 849 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 850 | if (attempts++ > 1000) { |
| 851 | /* We must reset the transmitter */ |
| 852 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 & (~XRST)); |
| 853 | udelay(10); |
| 854 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST); |
| 855 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 856 | dev_err(mcbsp->dev, "McBSP%d transmitter not " |
| 857 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 858 | return -EAGAIN; |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | /* We first need to enable the bus clock */ |
| 863 | if (tx_word_length > OMAP_MCBSP_WORD_16) |
| 864 | OMAP_MCBSP_WRITE(io_base, DXR2, clock_word >> 16); |
| 865 | OMAP_MCBSP_WRITE(io_base, DXR1, clock_word & 0xffff); |
| 866 | |
| 867 | /* We wait for the receiver to be ready */ |
| 868 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 869 | while (!(spcr1 & RRDY)) { |
| 870 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 871 | if (attempts++ > 1000) { |
| 872 | /* We must reset the receiver */ |
| 873 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 & (~RRST)); |
| 874 | udelay(10); |
| 875 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST); |
| 876 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 877 | dev_err(mcbsp->dev, "McBSP%d receiver not " |
| 878 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 879 | return -EAGAIN; |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | /* Receiver is ready, there is something for us */ |
| 884 | if (rx_word_length > OMAP_MCBSP_WORD_16) |
| 885 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); |
| 886 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); |
| 887 | |
| 888 | word[0] = (word_lsb | (word_msb << 16)); |
| 889 | |
| 890 | return 0; |
| 891 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 892 | EXPORT_SYMBOL(omap_mcbsp_spi_master_recv_word_poll); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 893 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 894 | /* |
| 895 | * Simple DMA based buffer rx/tx routines. |
| 896 | * Nothing fancy, just a single buffer tx/rx through DMA. |
| 897 | * The DMA resources are released once the transfer is done. |
| 898 | * For anything fancier, you should use your own customized DMA |
| 899 | * routines and callbacks. |
| 900 | */ |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 901 | int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, |
| 902 | unsigned int length) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 903 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 904 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 905 | int dma_tx_ch; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 906 | int src_port = 0; |
| 907 | int dest_port = 0; |
| 908 | int sync_dev = 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 909 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 910 | if (!omap_mcbsp_check_valid_id(id)) { |
| 911 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 912 | return -ENODEV; |
| 913 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 914 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 915 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 916 | if (omap_request_dma(mcbsp->dma_tx_sync, "McBSP TX", |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 917 | omap_mcbsp_tx_dma_callback, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 918 | mcbsp, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 919 | &dma_tx_ch)) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 920 | dev_err(mcbsp->dev, " Unable to request DMA channel for " |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 921 | "McBSP%d TX. Trying IRQ based TX\n", |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 922 | mcbsp->id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 923 | return -EAGAIN; |
| 924 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 925 | mcbsp->dma_tx_lch = dma_tx_ch; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 926 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 927 | dev_err(mcbsp->dev, "McBSP%d TX DMA on channel %d\n", mcbsp->id, |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 928 | dma_tx_ch); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 929 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 930 | init_completion(&mcbsp->tx_dma_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 931 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 932 | if (cpu_class_is_omap1()) { |
| 933 | src_port = OMAP_DMA_PORT_TIPB; |
| 934 | dest_port = OMAP_DMA_PORT_EMIFF; |
| 935 | } |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 936 | if (cpu_class_is_omap2()) |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 937 | sync_dev = mcbsp->dma_tx_sync; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 938 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 939 | omap_set_dma_transfer_params(mcbsp->dma_tx_lch, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 940 | OMAP_DMA_DATA_TYPE_S16, |
| 941 | length >> 1, 1, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 942 | OMAP_DMA_SYNC_ELEMENT, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 943 | sync_dev, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 944 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 945 | omap_set_dma_dest_params(mcbsp->dma_tx_lch, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 946 | src_port, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 947 | OMAP_DMA_AMODE_CONSTANT, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 948 | mcbsp->phys_base + OMAP_MCBSP_REG_DXR1, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 949 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 950 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 951 | omap_set_dma_src_params(mcbsp->dma_tx_lch, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 952 | dest_port, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 953 | OMAP_DMA_AMODE_POST_INC, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 954 | buffer, |
| 955 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 956 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 957 | omap_start_dma(mcbsp->dma_tx_lch); |
| 958 | wait_for_completion(&mcbsp->tx_dma_completion); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 959 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 960 | return 0; |
| 961 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 962 | EXPORT_SYMBOL(omap_mcbsp_xmit_buffer); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 963 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 964 | int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, |
| 965 | unsigned int length) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 966 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 967 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 968 | int dma_rx_ch; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 969 | int src_port = 0; |
| 970 | int dest_port = 0; |
| 971 | int sync_dev = 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 972 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 973 | if (!omap_mcbsp_check_valid_id(id)) { |
| 974 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 975 | return -ENODEV; |
| 976 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 977 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 978 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 979 | if (omap_request_dma(mcbsp->dma_rx_sync, "McBSP RX", |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 980 | omap_mcbsp_rx_dma_callback, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 981 | mcbsp, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 982 | &dma_rx_ch)) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 983 | dev_err(mcbsp->dev, "Unable to request DMA channel for " |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 984 | "McBSP%d RX. Trying IRQ based RX\n", |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 985 | mcbsp->id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 986 | return -EAGAIN; |
| 987 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 988 | mcbsp->dma_rx_lch = dma_rx_ch; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 989 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 990 | dev_err(mcbsp->dev, "McBSP%d RX DMA on channel %d\n", mcbsp->id, |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 991 | dma_rx_ch); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 992 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 993 | init_completion(&mcbsp->rx_dma_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 994 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 995 | if (cpu_class_is_omap1()) { |
| 996 | src_port = OMAP_DMA_PORT_TIPB; |
| 997 | dest_port = OMAP_DMA_PORT_EMIFF; |
| 998 | } |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 999 | if (cpu_class_is_omap2()) |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1000 | sync_dev = mcbsp->dma_rx_sync; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 1001 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1002 | omap_set_dma_transfer_params(mcbsp->dma_rx_lch, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1003 | OMAP_DMA_DATA_TYPE_S16, |
| 1004 | length >> 1, 1, |
| 1005 | OMAP_DMA_SYNC_ELEMENT, |
| 1006 | sync_dev, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1007 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1008 | omap_set_dma_src_params(mcbsp->dma_rx_lch, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 1009 | src_port, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1010 | OMAP_DMA_AMODE_CONSTANT, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1011 | mcbsp->phys_base + OMAP_MCBSP_REG_DRR1, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 1012 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1013 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1014 | omap_set_dma_dest_params(mcbsp->dma_rx_lch, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1015 | dest_port, |
| 1016 | OMAP_DMA_AMODE_POST_INC, |
| 1017 | buffer, |
| 1018 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1019 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1020 | omap_start_dma(mcbsp->dma_rx_lch); |
| 1021 | wait_for_completion(&mcbsp->rx_dma_completion); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1022 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1023 | return 0; |
| 1024 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1025 | EXPORT_SYMBOL(omap_mcbsp_recv_buffer); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1026 | |
| 1027 | /* |
| 1028 | * SPI wrapper. |
| 1029 | * Since SPI setup is much simpler than the generic McBSP one, |
| 1030 | * this wrapper just need an omap_mcbsp_spi_cfg structure as an input. |
| 1031 | * Once this is done, you can call omap_mcbsp_start(). |
| 1032 | */ |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1033 | void omap_mcbsp_set_spi_mode(unsigned int id, |
| 1034 | const struct omap_mcbsp_spi_cfg *spi_cfg) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1035 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1036 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1037 | struct omap_mcbsp_reg_cfg mcbsp_cfg; |
| 1038 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1039 | if (!omap_mcbsp_check_valid_id(id)) { |
| 1040 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1041 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1042 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1043 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1044 | |
| 1045 | memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg)); |
| 1046 | |
| 1047 | /* SPI has only one frame */ |
| 1048 | mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0)); |
| 1049 | mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0)); |
| 1050 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1051 | /* Clock stop mode */ |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1052 | if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY) |
| 1053 | mcbsp_cfg.spcr1 |= (1 << 12); |
| 1054 | else |
| 1055 | mcbsp_cfg.spcr1 |= (3 << 11); |
| 1056 | |
| 1057 | /* Set clock parities */ |
| 1058 | if (spi_cfg->rx_clock_polarity == OMAP_MCBSP_CLK_RISING) |
| 1059 | mcbsp_cfg.pcr0 |= CLKRP; |
| 1060 | else |
| 1061 | mcbsp_cfg.pcr0 &= ~CLKRP; |
| 1062 | |
| 1063 | if (spi_cfg->tx_clock_polarity == OMAP_MCBSP_CLK_RISING) |
| 1064 | mcbsp_cfg.pcr0 &= ~CLKXP; |
| 1065 | else |
| 1066 | mcbsp_cfg.pcr0 |= CLKXP; |
| 1067 | |
| 1068 | /* Set SCLKME to 0 and CLKSM to 1 */ |
| 1069 | mcbsp_cfg.pcr0 &= ~SCLKME; |
| 1070 | mcbsp_cfg.srgr2 |= CLKSM; |
| 1071 | |
| 1072 | /* Set FSXP */ |
| 1073 | if (spi_cfg->fsx_polarity == OMAP_MCBSP_FS_ACTIVE_HIGH) |
| 1074 | mcbsp_cfg.pcr0 &= ~FSXP; |
| 1075 | else |
| 1076 | mcbsp_cfg.pcr0 |= FSXP; |
| 1077 | |
| 1078 | if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) { |
| 1079 | mcbsp_cfg.pcr0 |= CLKXM; |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1080 | mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div - 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1081 | mcbsp_cfg.pcr0 |= FSXM; |
| 1082 | mcbsp_cfg.srgr2 &= ~FSGM; |
| 1083 | mcbsp_cfg.xcr2 |= XDATDLY(1); |
| 1084 | mcbsp_cfg.rcr2 |= RDATDLY(1); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1085 | } else { |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1086 | mcbsp_cfg.pcr0 &= ~CLKXM; |
| 1087 | mcbsp_cfg.srgr1 |= CLKGDV(1); |
| 1088 | mcbsp_cfg.pcr0 &= ~FSXM; |
| 1089 | mcbsp_cfg.xcr2 &= ~XDATDLY(3); |
| 1090 | mcbsp_cfg.rcr2 &= ~RDATDLY(3); |
| 1091 | } |
| 1092 | |
| 1093 | mcbsp_cfg.xcr2 &= ~XPHASE; |
| 1094 | mcbsp_cfg.rcr2 &= ~RPHASE; |
| 1095 | |
| 1096 | omap_mcbsp_config(id, &mcbsp_cfg); |
| 1097 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1098 | EXPORT_SYMBOL(omap_mcbsp_set_spi_mode); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1099 | |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1100 | #ifdef CONFIG_ARCH_OMAP34XX |
| 1101 | #define max_thres(m) (mcbsp->pdata->buffer_size) |
| 1102 | #define valid_threshold(m, val) ((val) <= max_thres(m)) |
| 1103 | #define THRESHOLD_PROP_BUILDER(prop) \ |
| 1104 | static ssize_t prop##_show(struct device *dev, \ |
| 1105 | struct device_attribute *attr, char *buf) \ |
| 1106 | { \ |
| 1107 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \ |
| 1108 | \ |
| 1109 | return sprintf(buf, "%u\n", mcbsp->prop); \ |
| 1110 | } \ |
| 1111 | \ |
| 1112 | static ssize_t prop##_store(struct device *dev, \ |
| 1113 | struct device_attribute *attr, \ |
| 1114 | const char *buf, size_t size) \ |
| 1115 | { \ |
| 1116 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \ |
| 1117 | unsigned long val; \ |
| 1118 | int status; \ |
| 1119 | \ |
| 1120 | status = strict_strtoul(buf, 0, &val); \ |
| 1121 | if (status) \ |
| 1122 | return status; \ |
| 1123 | \ |
| 1124 | if (!valid_threshold(mcbsp, val)) \ |
| 1125 | return -EDOM; \ |
| 1126 | \ |
| 1127 | mcbsp->prop = val; \ |
| 1128 | return size; \ |
| 1129 | } \ |
| 1130 | \ |
| 1131 | static DEVICE_ATTR(prop, 0644, prop##_show, prop##_store); |
| 1132 | |
| 1133 | THRESHOLD_PROP_BUILDER(max_tx_thres); |
| 1134 | THRESHOLD_PROP_BUILDER(max_rx_thres); |
| 1135 | |
Jarkko Nikula | 9b30050 | 2009-08-24 17:45:50 +0300 | [diff] [blame] | 1136 | static const char *dma_op_modes[] = { |
| 1137 | "element", "threshold", "frame", |
| 1138 | }; |
| 1139 | |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1140 | static ssize_t dma_op_mode_show(struct device *dev, |
| 1141 | struct device_attribute *attr, char *buf) |
| 1142 | { |
| 1143 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); |
Jarkko Nikula | 9b30050 | 2009-08-24 17:45:50 +0300 | [diff] [blame] | 1144 | int dma_op_mode, i = 0; |
| 1145 | ssize_t len = 0; |
| 1146 | const char * const *s; |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1147 | |
| 1148 | spin_lock_irq(&mcbsp->lock); |
| 1149 | dma_op_mode = mcbsp->dma_op_mode; |
| 1150 | spin_unlock_irq(&mcbsp->lock); |
| 1151 | |
Jarkko Nikula | 9b30050 | 2009-08-24 17:45:50 +0300 | [diff] [blame] | 1152 | for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) { |
| 1153 | if (dma_op_mode == i) |
| 1154 | len += sprintf(buf + len, "[%s] ", *s); |
| 1155 | else |
| 1156 | len += sprintf(buf + len, "%s ", *s); |
| 1157 | } |
| 1158 | len += sprintf(buf + len, "\n"); |
| 1159 | |
| 1160 | return len; |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | static ssize_t dma_op_mode_store(struct device *dev, |
| 1164 | struct device_attribute *attr, |
| 1165 | const char *buf, size_t size) |
| 1166 | { |
| 1167 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); |
Jarkko Nikula | 9b30050 | 2009-08-24 17:45:50 +0300 | [diff] [blame] | 1168 | const char * const *s; |
| 1169 | int i = 0; |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1170 | |
Jarkko Nikula | 9b30050 | 2009-08-24 17:45:50 +0300 | [diff] [blame] | 1171 | for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) |
| 1172 | if (sysfs_streq(buf, *s)) |
| 1173 | break; |
| 1174 | |
| 1175 | if (i == ARRAY_SIZE(dma_op_modes)) |
| 1176 | return -EINVAL; |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1177 | |
| 1178 | spin_lock_irq(&mcbsp->lock); |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1179 | if (!mcbsp->free) { |
| 1180 | size = -EBUSY; |
| 1181 | goto unlock; |
| 1182 | } |
Jarkko Nikula | 9b30050 | 2009-08-24 17:45:50 +0300 | [diff] [blame] | 1183 | mcbsp->dma_op_mode = i; |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1184 | |
| 1185 | unlock: |
| 1186 | spin_unlock_irq(&mcbsp->lock); |
| 1187 | |
| 1188 | return size; |
| 1189 | } |
| 1190 | |
| 1191 | static DEVICE_ATTR(dma_op_mode, 0644, dma_op_mode_show, dma_op_mode_store); |
| 1192 | |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1193 | static const struct attribute *additional_attrs[] = { |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1194 | &dev_attr_max_tx_thres.attr, |
| 1195 | &dev_attr_max_rx_thres.attr, |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1196 | &dev_attr_dma_op_mode.attr, |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1197 | NULL, |
| 1198 | }; |
| 1199 | |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1200 | static const struct attribute_group additional_attr_group = { |
| 1201 | .attrs = (struct attribute **)additional_attrs, |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1202 | }; |
| 1203 | |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1204 | static inline int __devinit omap_additional_add(struct device *dev) |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1205 | { |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1206 | return sysfs_create_group(&dev->kobj, &additional_attr_group); |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1207 | } |
| 1208 | |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1209 | static inline void __devexit omap_additional_remove(struct device *dev) |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1210 | { |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1211 | sysfs_remove_group(&dev->kobj, &additional_attr_group); |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1212 | } |
| 1213 | |
| 1214 | static inline void __devinit omap34xx_device_init(struct omap_mcbsp *mcbsp) |
| 1215 | { |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1216 | mcbsp->dma_op_mode = MCBSP_DMA_MODE_ELEMENT; |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1217 | if (cpu_is_omap34xx()) { |
| 1218 | mcbsp->max_tx_thres = max_thres(mcbsp); |
| 1219 | mcbsp->max_rx_thres = max_thres(mcbsp); |
Peter Ujfalusi | 98cb20e | 2009-08-20 16:18:14 +0300 | [diff] [blame] | 1220 | /* |
| 1221 | * REVISIT: Set dmap_op_mode to THRESHOLD as default |
| 1222 | * for mcbsp2 instances. |
| 1223 | */ |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1224 | if (omap_additional_add(mcbsp->dev)) |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1225 | dev_warn(mcbsp->dev, |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1226 | "Unable to create additional controls\n"); |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1227 | } else { |
| 1228 | mcbsp->max_tx_thres = -EINVAL; |
| 1229 | mcbsp->max_rx_thres = -EINVAL; |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | static inline void __devexit omap34xx_device_exit(struct omap_mcbsp *mcbsp) |
| 1234 | { |
| 1235 | if (cpu_is_omap34xx()) |
Eduardo Valentin | 4c8200a | 2009-08-20 16:18:13 +0300 | [diff] [blame] | 1236 | omap_additional_remove(mcbsp->dev); |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1237 | } |
| 1238 | #else |
| 1239 | static inline void __devinit omap34xx_device_init(struct omap_mcbsp *mcbsp) {} |
| 1240 | static inline void __devexit omap34xx_device_exit(struct omap_mcbsp *mcbsp) {} |
| 1241 | #endif /* CONFIG_ARCH_OMAP34XX */ |
| 1242 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1243 | /* |
| 1244 | * McBSP1 and McBSP3 are directly mapped on 1610 and 1510. |
| 1245 | * 730 has only 2 McBSP, and both of them are MPU peripherals. |
| 1246 | */ |
Uwe Kleine-König | 25cef22 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1247 | static int __devinit omap_mcbsp_probe(struct platform_device *pdev) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1248 | { |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1249 | struct omap_mcbsp_platform_data *pdata = pdev->dev.platform_data; |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1250 | struct omap_mcbsp *mcbsp; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1251 | int id = pdev->id - 1; |
| 1252 | int ret = 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1253 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1254 | if (!pdata) { |
| 1255 | dev_err(&pdev->dev, "McBSP device initialized without" |
| 1256 | "platform data\n"); |
| 1257 | ret = -EINVAL; |
| 1258 | goto exit; |
| 1259 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1260 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1261 | dev_dbg(&pdev->dev, "Initializing OMAP McBSP (%d).\n", pdev->id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1262 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1263 | if (id >= omap_mcbsp_count) { |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1264 | dev_err(&pdev->dev, "Invalid McBSP device id (%d)\n", id); |
| 1265 | ret = -EINVAL; |
| 1266 | goto exit; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1267 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1268 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1269 | mcbsp = kzalloc(sizeof(struct omap_mcbsp), GFP_KERNEL); |
| 1270 | if (!mcbsp) { |
| 1271 | ret = -ENOMEM; |
| 1272 | goto exit; |
| 1273 | } |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1274 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1275 | spin_lock_init(&mcbsp->lock); |
| 1276 | mcbsp->id = id + 1; |
| 1277 | mcbsp->free = 1; |
| 1278 | mcbsp->dma_tx_lch = -1; |
| 1279 | mcbsp->dma_rx_lch = -1; |
| 1280 | |
| 1281 | mcbsp->phys_base = pdata->phys_base; |
| 1282 | mcbsp->io_base = ioremap(pdata->phys_base, SZ_4K); |
| 1283 | if (!mcbsp->io_base) { |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1284 | ret = -ENOMEM; |
| 1285 | goto err_ioremap; |
| 1286 | } |
| 1287 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1288 | /* Default I/O is IRQ based */ |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1289 | mcbsp->io_type = OMAP_MCBSP_IRQ_IO; |
| 1290 | mcbsp->tx_irq = pdata->tx_irq; |
| 1291 | mcbsp->rx_irq = pdata->rx_irq; |
| 1292 | mcbsp->dma_rx_sync = pdata->dma_rx_sync; |
| 1293 | mcbsp->dma_tx_sync = pdata->dma_tx_sync; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1294 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1295 | mcbsp->iclk = clk_get(&pdev->dev, "ick"); |
| 1296 | if (IS_ERR(mcbsp->iclk)) { |
| 1297 | ret = PTR_ERR(mcbsp->iclk); |
| 1298 | dev_err(&pdev->dev, "unable to get ick: %d\n", ret); |
| 1299 | goto err_iclk; |
| 1300 | } |
Stanley.Miao | 0615115 | 2009-01-29 08:57:12 -0800 | [diff] [blame] | 1301 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1302 | mcbsp->fclk = clk_get(&pdev->dev, "fck"); |
| 1303 | if (IS_ERR(mcbsp->fclk)) { |
| 1304 | ret = PTR_ERR(mcbsp->fclk); |
| 1305 | dev_err(&pdev->dev, "unable to get fck: %d\n", ret); |
| 1306 | goto err_fclk; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1307 | } |
| 1308 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1309 | mcbsp->pdata = pdata; |
| 1310 | mcbsp->dev = &pdev->dev; |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1311 | mcbsp_ptr[id] = mcbsp; |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1312 | platform_set_drvdata(pdev, mcbsp); |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1313 | |
| 1314 | /* Initialize mcbsp properties for OMAP34XX if needed / applicable */ |
| 1315 | omap34xx_device_init(mcbsp); |
| 1316 | |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1317 | return 0; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1318 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1319 | err_fclk: |
| 1320 | clk_put(mcbsp->iclk); |
| 1321 | err_iclk: |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1322 | iounmap(mcbsp->io_base); |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1323 | err_ioremap: |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1324 | kfree(mcbsp); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1325 | exit: |
| 1326 | return ret; |
| 1327 | } |
| 1328 | |
Uwe Kleine-König | 25cef22 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1329 | static int __devexit omap_mcbsp_remove(struct platform_device *pdev) |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1330 | { |
| 1331 | struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev); |
| 1332 | |
| 1333 | platform_set_drvdata(pdev, NULL); |
| 1334 | if (mcbsp) { |
| 1335 | |
| 1336 | if (mcbsp->pdata && mcbsp->pdata->ops && |
| 1337 | mcbsp->pdata->ops->free) |
| 1338 | mcbsp->pdata->ops->free(mcbsp->id); |
| 1339 | |
Eduardo Valentin | a1a56f5f | 2009-08-20 16:18:11 +0300 | [diff] [blame] | 1340 | omap34xx_device_exit(mcbsp); |
| 1341 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1342 | clk_disable(mcbsp->fclk); |
| 1343 | clk_disable(mcbsp->iclk); |
| 1344 | clk_put(mcbsp->fclk); |
| 1345 | clk_put(mcbsp->iclk); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1346 | |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1347 | iounmap(mcbsp->io_base); |
| 1348 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1349 | mcbsp->fclk = NULL; |
| 1350 | mcbsp->iclk = NULL; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1351 | mcbsp->free = 0; |
| 1352 | mcbsp->dev = NULL; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1353 | } |
| 1354 | |
| 1355 | return 0; |
| 1356 | } |
| 1357 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1358 | static struct platform_driver omap_mcbsp_driver = { |
| 1359 | .probe = omap_mcbsp_probe, |
Uwe Kleine-König | 25cef22 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1360 | .remove = __devexit_p(omap_mcbsp_remove), |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1361 | .driver = { |
| 1362 | .name = "omap-mcbsp", |
| 1363 | }, |
| 1364 | }; |
| 1365 | |
| 1366 | int __init omap_mcbsp_init(void) |
| 1367 | { |
| 1368 | /* Register the McBSP driver */ |
| 1369 | return platform_driver_register(&omap_mcbsp_driver); |
| 1370 | } |