Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Driver for the PSC of the Freescale MPC52xx PSCs configured as UARTs. |
| 3 | * |
| 4 | * FIXME According to the usermanual the status bits in the status register |
| 5 | * are only updated when the peripherals access the FIFO and not when the |
| 6 | * CPU access them. So since we use this bits to know when we stop writing |
| 7 | * and reading, they may not be updated in-time and a race condition may |
| 8 | * exists. But I haven't be able to prove this and I don't care. But if |
| 9 | * any problem arises, it might worth checking. The TX/RX FIFO Stats |
| 10 | * registers should be used in addition. |
| 11 | * Update: Actually, they seem updated ... At least the bits we use. |
| 12 | * |
| 13 | * |
| 14 | * Maintainer : Sylvain Munaut <tnt@246tNt.com> |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 15 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * Some of the code has been inspired/copied from the 2.4 code written |
| 17 | * by Dale Farnsworth <dfarnsworth@mvista.com>. |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 18 | * |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 19 | * Copyright (C) 2008 Freescale Semiconductor Inc. |
| 20 | * John Rigby <jrigby@gmail.com> |
| 21 | * Added support for MPC5121 |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 22 | * Copyright (C) 2006 Secret Lab Technologies Ltd. |
| 23 | * Grant Likely <grant.likely@secretlab.ca> |
| 24 | * Copyright (C) 2004-2006 Sylvain Munaut <tnt@246tNt.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | * Copyright (C) 2003 MontaVista, Software, Inc. |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 26 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | * This file is licensed under the terms of the GNU General Public License |
| 28 | * version 2. This program is licensed "as is" without any warranty of any |
| 29 | * kind, whether express or implied. |
| 30 | */ |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | /* Platform device Usage : |
| 33 | * |
| 34 | * Since PSCs can have multiple function, the correct driver for each one |
| 35 | * is selected by calling mpc52xx_match_psc_function(...). The function |
| 36 | * handled by this driver is "uart". |
| 37 | * |
| 38 | * The driver init all necessary registers to place the PSC in uart mode without |
| 39 | * DCD. However, the pin multiplexing aren't changed and should be set either |
| 40 | * by the bootloader or in the platform init code. |
| 41 | * |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 42 | * The idx field must be equal to the PSC index (e.g. 0 for PSC1, 1 for PSC2, |
Sylvain Munaut | d62de3a | 2006-01-06 00:11:32 -0800 | [diff] [blame] | 43 | * and so on). So the PSC1 is mapped to /dev/ttyPSC0, PSC2 to /dev/ttyPSC1 and |
| 44 | * so on. But be warned, it's an ABSOLUTE REQUIREMENT ! This is needed mainly |
| 45 | * fpr the console code : without this 1:1 mapping, at early boot time, when we |
Uwe Zeisberger | c30fe7f | 2006-03-24 18:23:14 +0100 | [diff] [blame] | 46 | * are parsing the kernel args console=ttyPSC?, we wouldn't know which PSC it |
Sylvain Munaut | d62de3a | 2006-01-06 00:11:32 -0800 | [diff] [blame] | 47 | * will be mapped to. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | */ |
| 49 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 50 | /* OF Platform device Usage : |
| 51 | * |
| 52 | * This driver is only used for PSCs configured in uart mode. The device |
Grant Likely | 3b5ebf8 | 2009-02-03 12:30:25 -0700 | [diff] [blame] | 53 | * tree will have a node for each PSC with "mpc52xx-psc-uart" in the compatible |
| 54 | * list. |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 55 | * |
| 56 | * By default, PSC devices are enumerated in the order they are found. However |
| 57 | * a particular PSC number can be forces by adding 'device_no = <port#>' |
| 58 | * to the device node. |
| 59 | * |
| 60 | * The driver init all necessary registers to place the PSC in uart mode without |
| 61 | * DCD. However, the pin multiplexing aren't changed and should be set either |
| 62 | * by the bootloader or in the platform init code. |
| 63 | */ |
| 64 | |
| 65 | #undef DEBUG |
| 66 | |
| 67 | #include <linux/device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include <linux/module.h> |
| 69 | #include <linux/tty.h> |
| 70 | #include <linux/serial.h> |
| 71 | #include <linux/sysrq.h> |
| 72 | #include <linux/console.h> |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 73 | #include <linux/delay.h> |
| 74 | #include <linux/io.h> |
Grant Likely | 283029d | 2008-01-09 06:20:40 +1100 | [diff] [blame] | 75 | #include <linux/of.h> |
| 76 | #include <linux/of_platform.h> |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #include <asm/mpc52xx.h> |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 79 | #include <asm/mpc512x.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #include <asm/mpc52xx_psc.h> |
| 81 | |
| 82 | #if defined(CONFIG_SERIAL_MPC52xx_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 83 | #define SUPPORT_SYSRQ |
| 84 | #endif |
| 85 | |
| 86 | #include <linux/serial_core.h> |
| 87 | |
| 88 | |
Sylvain Munaut | d62de3a | 2006-01-06 00:11:32 -0800 | [diff] [blame] | 89 | /* We've been assigned a range on the "Low-density serial ports" major */ |
| 90 | #define SERIAL_PSC_MAJOR 204 |
| 91 | #define SERIAL_PSC_MINOR 148 |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | #define ISR_PASS_LIMIT 256 /* Max number of iteration in the interrupt */ |
| 95 | |
| 96 | |
| 97 | static struct uart_port mpc52xx_uart_ports[MPC52xx_PSC_MAXNUM]; |
| 98 | /* Rem: - We use the read_status_mask as a shadow of |
| 99 | * psc->mpc52xx_psc_imr |
| 100 | * - It's important that is array is all zero on start as we |
| 101 | * use it to know if it's initialized or not ! If it's not sure |
| 102 | * it's cleared, then a memset(...,0,...) should be added to |
| 103 | * the console_init |
| 104 | */ |
Kumar Gala | 8d1fb8c | 2008-08-01 11:09:34 -0500 | [diff] [blame] | 105 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 106 | /* lookup table for matching device nodes to index numbers */ |
| 107 | static struct device_node *mpc52xx_uart_nodes[MPC52xx_PSC_MAXNUM]; |
| 108 | |
| 109 | static void mpc52xx_uart_of_enumerate(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #define PSC(port) ((struct mpc52xx_psc __iomem *)((port)->membase)) |
| 113 | |
| 114 | |
| 115 | /* Forward declaration of the interruption handling routine */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 116 | static irqreturn_t mpc52xx_uart_int(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | |
| 119 | /* Simple macro to test if a port is console or not. This one is taken |
| 120 | * for serial_core.c and maybe should be moved to serial_core.h ? */ |
| 121 | #ifdef CONFIG_SERIAL_CORE_CONSOLE |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 122 | #define uart_console(port) \ |
| 123 | ((port)->cons && (port)->cons->index == (port)->line) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | #else |
| 125 | #define uart_console(port) (0) |
| 126 | #endif |
| 127 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 128 | /* ======================================================================== */ |
| 129 | /* PSC fifo operations for isolating differences between 52xx and 512x */ |
| 130 | /* ======================================================================== */ |
| 131 | |
| 132 | struct psc_ops { |
| 133 | void (*fifo_init)(struct uart_port *port); |
| 134 | int (*raw_rx_rdy)(struct uart_port *port); |
| 135 | int (*raw_tx_rdy)(struct uart_port *port); |
| 136 | int (*rx_rdy)(struct uart_port *port); |
| 137 | int (*tx_rdy)(struct uart_port *port); |
| 138 | int (*tx_empty)(struct uart_port *port); |
| 139 | void (*stop_rx)(struct uart_port *port); |
| 140 | void (*start_tx)(struct uart_port *port); |
| 141 | void (*stop_tx)(struct uart_port *port); |
| 142 | void (*rx_clr_irq)(struct uart_port *port); |
| 143 | void (*tx_clr_irq)(struct uart_port *port); |
| 144 | void (*write_char)(struct uart_port *port, unsigned char c); |
| 145 | unsigned char (*read_char)(struct uart_port *port); |
| 146 | void (*cw_disable_ints)(struct uart_port *port); |
| 147 | void (*cw_restore_ints)(struct uart_port *port); |
| 148 | unsigned long (*getuartclk)(void *p); |
| 149 | }; |
| 150 | |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 151 | #ifdef CONFIG_PPC_MPC52xx |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 152 | #define FIFO_52xx(port) ((struct mpc52xx_psc_fifo __iomem *)(PSC(port)+1)) |
| 153 | static void mpc52xx_psc_fifo_init(struct uart_port *port) |
| 154 | { |
| 155 | struct mpc52xx_psc __iomem *psc = PSC(port); |
| 156 | struct mpc52xx_psc_fifo __iomem *fifo = FIFO_52xx(port); |
| 157 | |
| 158 | /* /32 prescaler */ |
| 159 | out_be16(&psc->mpc52xx_psc_clock_select, 0xdd00); |
| 160 | |
| 161 | out_8(&fifo->rfcntl, 0x00); |
| 162 | out_be16(&fifo->rfalarm, 0x1ff); |
| 163 | out_8(&fifo->tfcntl, 0x07); |
| 164 | out_be16(&fifo->tfalarm, 0x80); |
| 165 | |
| 166 | port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY; |
| 167 | out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); |
| 168 | } |
| 169 | |
| 170 | static int mpc52xx_psc_raw_rx_rdy(struct uart_port *port) |
| 171 | { |
| 172 | return in_be16(&PSC(port)->mpc52xx_psc_status) |
| 173 | & MPC52xx_PSC_SR_RXRDY; |
| 174 | } |
| 175 | |
| 176 | static int mpc52xx_psc_raw_tx_rdy(struct uart_port *port) |
| 177 | { |
| 178 | return in_be16(&PSC(port)->mpc52xx_psc_status) |
| 179 | & MPC52xx_PSC_SR_TXRDY; |
| 180 | } |
| 181 | |
| 182 | |
| 183 | static int mpc52xx_psc_rx_rdy(struct uart_port *port) |
| 184 | { |
| 185 | return in_be16(&PSC(port)->mpc52xx_psc_isr) |
| 186 | & port->read_status_mask |
| 187 | & MPC52xx_PSC_IMR_RXRDY; |
| 188 | } |
| 189 | |
| 190 | static int mpc52xx_psc_tx_rdy(struct uart_port *port) |
| 191 | { |
| 192 | return in_be16(&PSC(port)->mpc52xx_psc_isr) |
| 193 | & port->read_status_mask |
| 194 | & MPC52xx_PSC_IMR_TXRDY; |
| 195 | } |
| 196 | |
| 197 | static int mpc52xx_psc_tx_empty(struct uart_port *port) |
| 198 | { |
| 199 | return in_be16(&PSC(port)->mpc52xx_psc_status) |
| 200 | & MPC52xx_PSC_SR_TXEMP; |
| 201 | } |
| 202 | |
| 203 | static void mpc52xx_psc_start_tx(struct uart_port *port) |
| 204 | { |
| 205 | port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY; |
| 206 | out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); |
| 207 | } |
| 208 | |
| 209 | static void mpc52xx_psc_stop_tx(struct uart_port *port) |
| 210 | { |
| 211 | port->read_status_mask &= ~MPC52xx_PSC_IMR_TXRDY; |
| 212 | out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); |
| 213 | } |
| 214 | |
| 215 | static void mpc52xx_psc_stop_rx(struct uart_port *port) |
| 216 | { |
| 217 | port->read_status_mask &= ~MPC52xx_PSC_IMR_RXRDY; |
| 218 | out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); |
| 219 | } |
| 220 | |
| 221 | static void mpc52xx_psc_rx_clr_irq(struct uart_port *port) |
| 222 | { |
| 223 | } |
| 224 | |
| 225 | static void mpc52xx_psc_tx_clr_irq(struct uart_port *port) |
| 226 | { |
| 227 | } |
| 228 | |
| 229 | static void mpc52xx_psc_write_char(struct uart_port *port, unsigned char c) |
| 230 | { |
| 231 | out_8(&PSC(port)->mpc52xx_psc_buffer_8, c); |
| 232 | } |
| 233 | |
| 234 | static unsigned char mpc52xx_psc_read_char(struct uart_port *port) |
| 235 | { |
| 236 | return in_8(&PSC(port)->mpc52xx_psc_buffer_8); |
| 237 | } |
| 238 | |
| 239 | static void mpc52xx_psc_cw_disable_ints(struct uart_port *port) |
| 240 | { |
| 241 | out_be16(&PSC(port)->mpc52xx_psc_imr, 0); |
| 242 | } |
| 243 | |
| 244 | static void mpc52xx_psc_cw_restore_ints(struct uart_port *port) |
| 245 | { |
| 246 | out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); |
| 247 | } |
| 248 | |
| 249 | /* Search for bus-frequency property in this node or a parent */ |
| 250 | static unsigned long mpc52xx_getuartclk(void *p) |
| 251 | { |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 252 | /* |
| 253 | * 5200 UARTs have a / 32 prescaler |
| 254 | * but the generic serial code assumes 16 |
| 255 | * so return ipb freq / 2 |
| 256 | */ |
| 257 | return mpc52xx_find_ipb_freq(p) / 2; |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | static struct psc_ops mpc52xx_psc_ops = { |
| 261 | .fifo_init = mpc52xx_psc_fifo_init, |
| 262 | .raw_rx_rdy = mpc52xx_psc_raw_rx_rdy, |
| 263 | .raw_tx_rdy = mpc52xx_psc_raw_tx_rdy, |
| 264 | .rx_rdy = mpc52xx_psc_rx_rdy, |
| 265 | .tx_rdy = mpc52xx_psc_tx_rdy, |
| 266 | .tx_empty = mpc52xx_psc_tx_empty, |
| 267 | .stop_rx = mpc52xx_psc_stop_rx, |
| 268 | .start_tx = mpc52xx_psc_start_tx, |
| 269 | .stop_tx = mpc52xx_psc_stop_tx, |
| 270 | .rx_clr_irq = mpc52xx_psc_rx_clr_irq, |
| 271 | .tx_clr_irq = mpc52xx_psc_tx_clr_irq, |
| 272 | .write_char = mpc52xx_psc_write_char, |
| 273 | .read_char = mpc52xx_psc_read_char, |
| 274 | .cw_disable_ints = mpc52xx_psc_cw_disable_ints, |
| 275 | .cw_restore_ints = mpc52xx_psc_cw_restore_ints, |
| 276 | .getuartclk = mpc52xx_getuartclk, |
| 277 | }; |
| 278 | |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 279 | #endif /* CONFIG_MPC52xx */ |
| 280 | |
| 281 | #ifdef CONFIG_PPC_MPC512x |
| 282 | #define FIFO_512x(port) ((struct mpc512x_psc_fifo __iomem *)(PSC(port)+1)) |
| 283 | static void mpc512x_psc_fifo_init(struct uart_port *port) |
| 284 | { |
| 285 | out_be32(&FIFO_512x(port)->txcmd, MPC512x_PSC_FIFO_RESET_SLICE); |
| 286 | out_be32(&FIFO_512x(port)->txcmd, MPC512x_PSC_FIFO_ENABLE_SLICE); |
| 287 | out_be32(&FIFO_512x(port)->txalarm, 1); |
| 288 | out_be32(&FIFO_512x(port)->tximr, 0); |
| 289 | |
| 290 | out_be32(&FIFO_512x(port)->rxcmd, MPC512x_PSC_FIFO_RESET_SLICE); |
| 291 | out_be32(&FIFO_512x(port)->rxcmd, MPC512x_PSC_FIFO_ENABLE_SLICE); |
| 292 | out_be32(&FIFO_512x(port)->rxalarm, 1); |
| 293 | out_be32(&FIFO_512x(port)->rximr, 0); |
| 294 | |
| 295 | out_be32(&FIFO_512x(port)->tximr, MPC512x_PSC_FIFO_ALARM); |
| 296 | out_be32(&FIFO_512x(port)->rximr, MPC512x_PSC_FIFO_ALARM); |
| 297 | } |
| 298 | |
| 299 | static int mpc512x_psc_raw_rx_rdy(struct uart_port *port) |
| 300 | { |
| 301 | return !(in_be32(&FIFO_512x(port)->rxsr) & MPC512x_PSC_FIFO_EMPTY); |
| 302 | } |
| 303 | |
| 304 | static int mpc512x_psc_raw_tx_rdy(struct uart_port *port) |
| 305 | { |
| 306 | return !(in_be32(&FIFO_512x(port)->txsr) & MPC512x_PSC_FIFO_FULL); |
| 307 | } |
| 308 | |
| 309 | static int mpc512x_psc_rx_rdy(struct uart_port *port) |
| 310 | { |
| 311 | return in_be32(&FIFO_512x(port)->rxsr) |
| 312 | & in_be32(&FIFO_512x(port)->rximr) |
| 313 | & MPC512x_PSC_FIFO_ALARM; |
| 314 | } |
| 315 | |
| 316 | static int mpc512x_psc_tx_rdy(struct uart_port *port) |
| 317 | { |
| 318 | return in_be32(&FIFO_512x(port)->txsr) |
| 319 | & in_be32(&FIFO_512x(port)->tximr) |
| 320 | & MPC512x_PSC_FIFO_ALARM; |
| 321 | } |
| 322 | |
| 323 | static int mpc512x_psc_tx_empty(struct uart_port *port) |
| 324 | { |
| 325 | return in_be32(&FIFO_512x(port)->txsr) |
| 326 | & MPC512x_PSC_FIFO_EMPTY; |
| 327 | } |
| 328 | |
| 329 | static void mpc512x_psc_stop_rx(struct uart_port *port) |
| 330 | { |
| 331 | unsigned long rx_fifo_imr; |
| 332 | |
| 333 | rx_fifo_imr = in_be32(&FIFO_512x(port)->rximr); |
| 334 | rx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM; |
| 335 | out_be32(&FIFO_512x(port)->rximr, rx_fifo_imr); |
| 336 | } |
| 337 | |
| 338 | static void mpc512x_psc_start_tx(struct uart_port *port) |
| 339 | { |
| 340 | unsigned long tx_fifo_imr; |
| 341 | |
| 342 | tx_fifo_imr = in_be32(&FIFO_512x(port)->tximr); |
| 343 | tx_fifo_imr |= MPC512x_PSC_FIFO_ALARM; |
| 344 | out_be32(&FIFO_512x(port)->tximr, tx_fifo_imr); |
| 345 | } |
| 346 | |
| 347 | static void mpc512x_psc_stop_tx(struct uart_port *port) |
| 348 | { |
| 349 | unsigned long tx_fifo_imr; |
| 350 | |
| 351 | tx_fifo_imr = in_be32(&FIFO_512x(port)->tximr); |
| 352 | tx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM; |
| 353 | out_be32(&FIFO_512x(port)->tximr, tx_fifo_imr); |
| 354 | } |
| 355 | |
| 356 | static void mpc512x_psc_rx_clr_irq(struct uart_port *port) |
| 357 | { |
| 358 | out_be32(&FIFO_512x(port)->rxisr, in_be32(&FIFO_512x(port)->rxisr)); |
| 359 | } |
| 360 | |
| 361 | static void mpc512x_psc_tx_clr_irq(struct uart_port *port) |
| 362 | { |
| 363 | out_be32(&FIFO_512x(port)->txisr, in_be32(&FIFO_512x(port)->txisr)); |
| 364 | } |
| 365 | |
| 366 | static void mpc512x_psc_write_char(struct uart_port *port, unsigned char c) |
| 367 | { |
| 368 | out_8(&FIFO_512x(port)->txdata_8, c); |
| 369 | } |
| 370 | |
| 371 | static unsigned char mpc512x_psc_read_char(struct uart_port *port) |
| 372 | { |
| 373 | return in_8(&FIFO_512x(port)->rxdata_8); |
| 374 | } |
| 375 | |
| 376 | static void mpc512x_psc_cw_disable_ints(struct uart_port *port) |
| 377 | { |
| 378 | port->read_status_mask = |
| 379 | in_be32(&FIFO_512x(port)->tximr) << 16 | |
| 380 | in_be32(&FIFO_512x(port)->rximr); |
| 381 | out_be32(&FIFO_512x(port)->tximr, 0); |
| 382 | out_be32(&FIFO_512x(port)->rximr, 0); |
| 383 | } |
| 384 | |
| 385 | static void mpc512x_psc_cw_restore_ints(struct uart_port *port) |
| 386 | { |
| 387 | out_be32(&FIFO_512x(port)->tximr, |
| 388 | (port->read_status_mask >> 16) & 0x7f); |
| 389 | out_be32(&FIFO_512x(port)->rximr, port->read_status_mask & 0x7f); |
| 390 | } |
| 391 | |
| 392 | static unsigned long mpc512x_getuartclk(void *p) |
| 393 | { |
| 394 | return mpc512x_find_ips_freq(p); |
| 395 | } |
| 396 | |
| 397 | static struct psc_ops mpc512x_psc_ops = { |
| 398 | .fifo_init = mpc512x_psc_fifo_init, |
| 399 | .raw_rx_rdy = mpc512x_psc_raw_rx_rdy, |
| 400 | .raw_tx_rdy = mpc512x_psc_raw_tx_rdy, |
| 401 | .rx_rdy = mpc512x_psc_rx_rdy, |
| 402 | .tx_rdy = mpc512x_psc_tx_rdy, |
| 403 | .tx_empty = mpc512x_psc_tx_empty, |
| 404 | .stop_rx = mpc512x_psc_stop_rx, |
| 405 | .start_tx = mpc512x_psc_start_tx, |
| 406 | .stop_tx = mpc512x_psc_stop_tx, |
| 407 | .rx_clr_irq = mpc512x_psc_rx_clr_irq, |
| 408 | .tx_clr_irq = mpc512x_psc_tx_clr_irq, |
| 409 | .write_char = mpc512x_psc_write_char, |
| 410 | .read_char = mpc512x_psc_read_char, |
| 411 | .cw_disable_ints = mpc512x_psc_cw_disable_ints, |
| 412 | .cw_restore_ints = mpc512x_psc_cw_restore_ints, |
| 413 | .getuartclk = mpc512x_getuartclk, |
| 414 | }; |
| 415 | #endif |
| 416 | |
| 417 | static struct psc_ops *psc_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | /* ======================================================================== */ |
| 420 | /* UART operations */ |
| 421 | /* ======================================================================== */ |
| 422 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 423 | static unsigned int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | mpc52xx_uart_tx_empty(struct uart_port *port) |
| 425 | { |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 426 | return psc_ops->tx_empty(port) ? TIOCSER_TEMT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 429 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | mpc52xx_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 431 | { |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 432 | if (mctrl & TIOCM_RTS) |
| 433 | out_8(&PSC(port)->op1, MPC52xx_PSC_OP_RTS); |
| 434 | else |
| 435 | out_8(&PSC(port)->op0, MPC52xx_PSC_OP_RTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } |
| 437 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 438 | static unsigned int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | mpc52xx_uart_get_mctrl(struct uart_port *port) |
| 440 | { |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 441 | unsigned int ret = TIOCM_DSR; |
| 442 | u8 status = in_8(&PSC(port)->mpc52xx_psc_ipcr); |
| 443 | |
| 444 | if (!(status & MPC52xx_PSC_CTS)) |
| 445 | ret |= TIOCM_CTS; |
| 446 | if (!(status & MPC52xx_PSC_DCD)) |
| 447 | ret |= TIOCM_CAR; |
| 448 | |
| 449 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 452 | static void |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 453 | mpc52xx_uart_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | { |
| 455 | /* port->lock taken by caller */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 456 | psc_ops->stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 459 | static void |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 460 | mpc52xx_uart_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | { |
| 462 | /* port->lock taken by caller */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 463 | psc_ops->start_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 466 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | mpc52xx_uart_send_xchar(struct uart_port *port, char ch) |
| 468 | { |
| 469 | unsigned long flags; |
| 470 | spin_lock_irqsave(&port->lock, flags); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | port->x_char = ch; |
| 473 | if (ch) { |
| 474 | /* Make sure tx interrupts are on */ |
| 475 | /* Truly necessary ??? They should be anyway */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 476 | psc_ops->start_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | spin_unlock_irqrestore(&port->lock, flags); |
| 480 | } |
| 481 | |
| 482 | static void |
| 483 | mpc52xx_uart_stop_rx(struct uart_port *port) |
| 484 | { |
| 485 | /* port->lock taken by caller */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 486 | psc_ops->stop_rx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | static void |
| 490 | mpc52xx_uart_enable_ms(struct uart_port *port) |
| 491 | { |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 492 | struct mpc52xx_psc __iomem *psc = PSC(port); |
| 493 | |
| 494 | /* clear D_*-bits by reading them */ |
| 495 | in_8(&psc->mpc52xx_psc_ipcr); |
| 496 | /* enable CTS and DCD as IPC interrupts */ |
| 497 | out_8(&psc->mpc52xx_psc_acr, MPC52xx_PSC_IEC_CTS | MPC52xx_PSC_IEC_DCD); |
| 498 | |
| 499 | port->read_status_mask |= MPC52xx_PSC_IMR_IPC; |
| 500 | out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | static void |
| 504 | mpc52xx_uart_break_ctl(struct uart_port *port, int ctl) |
| 505 | { |
| 506 | unsigned long flags; |
| 507 | spin_lock_irqsave(&port->lock, flags); |
| 508 | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 509 | if (ctl == -1) |
| 510 | out_8(&PSC(port)->command, MPC52xx_PSC_START_BRK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | else |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 512 | out_8(&PSC(port)->command, MPC52xx_PSC_STOP_BRK); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | spin_unlock_irqrestore(&port->lock, flags); |
| 515 | } |
| 516 | |
| 517 | static int |
| 518 | mpc52xx_uart_startup(struct uart_port *port) |
| 519 | { |
| 520 | struct mpc52xx_psc __iomem *psc = PSC(port); |
| 521 | int ret; |
| 522 | |
| 523 | /* Request IRQ */ |
| 524 | ret = request_irq(port->irq, mpc52xx_uart_int, |
Grant Likely | d9f0c5f | 2009-02-04 11:23:56 -0700 | [diff] [blame] | 525 | IRQF_DISABLED | IRQF_SAMPLE_RANDOM, |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 526 | "mpc52xx_psc_uart", port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | if (ret) |
| 528 | return ret; |
| 529 | |
| 530 | /* Reset/activate the port, clear and enable interrupts */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 531 | out_8(&psc->command, MPC52xx_PSC_RST_RX); |
| 532 | out_8(&psc->command, MPC52xx_PSC_RST_TX); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 533 | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 534 | out_be32(&psc->sicr, 0); /* UART mode DCD ignored */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 536 | psc_ops->fifo_init(port); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 537 | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 538 | out_8(&psc->command, MPC52xx_PSC_TX_ENABLE); |
| 539 | out_8(&psc->command, MPC52xx_PSC_RX_ENABLE); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | static void |
| 545 | mpc52xx_uart_shutdown(struct uart_port *port) |
| 546 | { |
| 547 | struct mpc52xx_psc __iomem *psc = PSC(port); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 548 | |
Grant Likely | a348119 | 2007-05-07 01:38:51 +1000 | [diff] [blame] | 549 | /* Shut down the port. Leave TX active if on a console port */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 550 | out_8(&psc->command, MPC52xx_PSC_RST_RX); |
Grant Likely | a348119 | 2007-05-07 01:38:51 +1000 | [diff] [blame] | 551 | if (!uart_console(port)) |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 552 | out_8(&psc->command, MPC52xx_PSC_RST_TX); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 553 | |
| 554 | port->read_status_mask = 0; |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 555 | out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
| 557 | /* Release interrupt */ |
| 558 | free_irq(port->irq, port); |
| 559 | } |
| 560 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 561 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 562 | mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new, |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 563 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | { |
| 565 | struct mpc52xx_psc __iomem *psc = PSC(port); |
| 566 | unsigned long flags; |
| 567 | unsigned char mr1, mr2; |
| 568 | unsigned short ctr; |
| 569 | unsigned int j, baud, quot; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | /* Prepare what we're gonna write */ |
| 572 | mr1 = 0; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | switch (new->c_cflag & CSIZE) { |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 575 | case CS5: mr1 |= MPC52xx_PSC_MODE_5_BITS; |
| 576 | break; |
| 577 | case CS6: mr1 |= MPC52xx_PSC_MODE_6_BITS; |
| 578 | break; |
| 579 | case CS7: mr1 |= MPC52xx_PSC_MODE_7_BITS; |
| 580 | break; |
| 581 | case CS8: |
| 582 | default: mr1 |= MPC52xx_PSC_MODE_8_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | if (new->c_cflag & PARENB) { |
| 586 | mr1 |= (new->c_cflag & PARODD) ? |
| 587 | MPC52xx_PSC_MODE_PARODD : MPC52xx_PSC_MODE_PAREVEN; |
| 588 | } else |
| 589 | mr1 |= MPC52xx_PSC_MODE_PARNONE; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 590 | |
| 591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | mr2 = 0; |
| 593 | |
| 594 | if (new->c_cflag & CSTOPB) |
| 595 | mr2 |= MPC52xx_PSC_MODE_TWO_STOP; |
| 596 | else |
| 597 | mr2 |= ((new->c_cflag & CSIZE) == CS5) ? |
| 598 | MPC52xx_PSC_MODE_ONE_STOP_5_BITS : |
| 599 | MPC52xx_PSC_MODE_ONE_STOP; |
| 600 | |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 601 | if (new->c_cflag & CRTSCTS) { |
| 602 | mr1 |= MPC52xx_PSC_MODE_RXRTS; |
| 603 | mr2 |= MPC52xx_PSC_MODE_TXCTS; |
| 604 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
| 606 | baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16); |
| 607 | quot = uart_get_divisor(port, baud); |
| 608 | ctr = quot & 0xffff; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | /* Get the lock */ |
| 611 | spin_lock_irqsave(&port->lock, flags); |
| 612 | |
| 613 | /* Update the per-port timeout */ |
| 614 | uart_update_timeout(port, new->c_cflag, baud); |
| 615 | |
Nick Andrew | c4f0124 | 2008-12-05 16:34:46 +0000 | [diff] [blame] | 616 | /* Do our best to flush TX & RX, so we don't lose anything */ |
| 617 | /* But we don't wait indefinitely ! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | j = 5000000; /* Maximum wait */ |
| 619 | /* FIXME Can't receive chars since set_termios might be called at early |
| 620 | * boot for the console, all stuff is not yet ready to receive at that |
| 621 | * time and that just makes the kernel oops */ |
| 622 | /* while (j-- && mpc52xx_uart_int_rx_chars(port)); */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 623 | while (!mpc52xx_uart_tx_empty(port) && --j) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | udelay(1); |
| 625 | |
| 626 | if (!j) |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 627 | printk(KERN_ERR "mpc52xx_uart.c: " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | "Unable to flush RX & TX fifos in-time in set_termios." |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 629 | "Some chars may have been lost.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
| 631 | /* Reset the TX & RX */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 632 | out_8(&psc->command, MPC52xx_PSC_RST_RX); |
| 633 | out_8(&psc->command, MPC52xx_PSC_RST_TX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
| 635 | /* Send new mode settings */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 636 | out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1); |
| 637 | out_8(&psc->mode, mr1); |
| 638 | out_8(&psc->mode, mr2); |
| 639 | out_8(&psc->ctur, ctr >> 8); |
| 640 | out_8(&psc->ctlr, ctr & 0xff); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 641 | |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 642 | if (UART_ENABLE_MS(port, new->c_cflag)) |
| 643 | mpc52xx_uart_enable_ms(port); |
| 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | /* Reenable TX & RX */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 646 | out_8(&psc->command, MPC52xx_PSC_TX_ENABLE); |
| 647 | out_8(&psc->command, MPC52xx_PSC_RX_ENABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | /* We're all set, release the lock */ |
| 650 | spin_unlock_irqrestore(&port->lock, flags); |
| 651 | } |
| 652 | |
| 653 | static const char * |
| 654 | mpc52xx_uart_type(struct uart_port *port) |
| 655 | { |
| 656 | return port->type == PORT_MPC52xx ? "MPC52xx PSC" : NULL; |
| 657 | } |
| 658 | |
| 659 | static void |
| 660 | mpc52xx_uart_release_port(struct uart_port *port) |
| 661 | { |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 662 | /* remapped by us ? */ |
| 663 | if (port->flags & UPF_IOREMAP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | iounmap(port->membase); |
| 665 | port->membase = NULL; |
| 666 | } |
| 667 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 668 | release_mem_region(port->mapbase, sizeof(struct mpc52xx_psc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | static int |
| 672 | mpc52xx_uart_request_port(struct uart_port *port) |
| 673 | { |
Amol Lad | be618f5 | 2006-09-30 23:29:23 -0700 | [diff] [blame] | 674 | int err; |
| 675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | if (port->flags & UPF_IOREMAP) /* Need to remap ? */ |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 677 | port->membase = ioremap(port->mapbase, |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 678 | sizeof(struct mpc52xx_psc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
| 680 | if (!port->membase) |
| 681 | return -EINVAL; |
| 682 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 683 | err = request_mem_region(port->mapbase, sizeof(struct mpc52xx_psc), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | "mpc52xx_psc_uart") != NULL ? 0 : -EBUSY; |
Amol Lad | be618f5 | 2006-09-30 23:29:23 -0700 | [diff] [blame] | 685 | |
| 686 | if (err && (port->flags & UPF_IOREMAP)) { |
| 687 | iounmap(port->membase); |
| 688 | port->membase = NULL; |
| 689 | } |
| 690 | |
| 691 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | static void |
| 695 | mpc52xx_uart_config_port(struct uart_port *port, int flags) |
| 696 | { |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 697 | if ((flags & UART_CONFIG_TYPE) |
| 698 | && (mpc52xx_uart_request_port(port) == 0)) |
| 699 | port->type = PORT_MPC52xx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | } |
| 701 | |
| 702 | static int |
| 703 | mpc52xx_uart_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 704 | { |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 705 | if (ser->type != PORT_UNKNOWN && ser->type != PORT_MPC52xx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return -EINVAL; |
| 707 | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 708 | if ((ser->irq != port->irq) || |
| 709 | (ser->io_type != SERIAL_IO_MEM) || |
| 710 | (ser->baud_base != port->uartclk) || |
| 711 | (ser->iomem_base != (void *)port->mapbase) || |
| 712 | (ser->hub6 != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | return -EINVAL; |
| 714 | |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | |
| 719 | static struct uart_ops mpc52xx_uart_ops = { |
| 720 | .tx_empty = mpc52xx_uart_tx_empty, |
| 721 | .set_mctrl = mpc52xx_uart_set_mctrl, |
| 722 | .get_mctrl = mpc52xx_uart_get_mctrl, |
| 723 | .stop_tx = mpc52xx_uart_stop_tx, |
| 724 | .start_tx = mpc52xx_uart_start_tx, |
| 725 | .send_xchar = mpc52xx_uart_send_xchar, |
| 726 | .stop_rx = mpc52xx_uart_stop_rx, |
| 727 | .enable_ms = mpc52xx_uart_enable_ms, |
| 728 | .break_ctl = mpc52xx_uart_break_ctl, |
| 729 | .startup = mpc52xx_uart_startup, |
| 730 | .shutdown = mpc52xx_uart_shutdown, |
| 731 | .set_termios = mpc52xx_uart_set_termios, |
| 732 | /* .pm = mpc52xx_uart_pm, Not supported yet */ |
| 733 | /* .set_wake = mpc52xx_uart_set_wake, Not supported yet */ |
| 734 | .type = mpc52xx_uart_type, |
| 735 | .release_port = mpc52xx_uart_release_port, |
| 736 | .request_port = mpc52xx_uart_request_port, |
| 737 | .config_port = mpc52xx_uart_config_port, |
| 738 | .verify_port = mpc52xx_uart_verify_port |
| 739 | }; |
| 740 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | /* ======================================================================== */ |
| 743 | /* Interrupt handling */ |
| 744 | /* ======================================================================== */ |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | static inline int |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 747 | mpc52xx_uart_int_rx_chars(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | { |
Takashi Iwai | a88487c | 2008-07-16 21:54:42 +0100 | [diff] [blame] | 749 | struct tty_struct *tty = port->info->port.tty; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 750 | unsigned char ch, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | unsigned short status; |
| 752 | |
| 753 | /* While we can read, do so ! */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 754 | while (psc_ops->raw_rx_rdy(port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | /* Get the char */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 756 | ch = psc_ops->read_char(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | |
| 758 | /* Handle sysreq char */ |
| 759 | #ifdef SUPPORT_SYSRQ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 760 | if (uart_handle_sysrq_char(port, ch)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | port->sysrq = 0; |
| 762 | continue; |
| 763 | } |
| 764 | #endif |
| 765 | |
| 766 | /* Store it */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 767 | |
| 768 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | port->icount.rx++; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 770 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 771 | status = in_be16(&PSC(port)->mpc52xx_psc_status); |
| 772 | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 773 | if (status & (MPC52xx_PSC_SR_PE | |
| 774 | MPC52xx_PSC_SR_FE | |
| 775 | MPC52xx_PSC_SR_RB)) { |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 776 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | if (status & MPC52xx_PSC_SR_RB) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 778 | flag = TTY_BREAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | uart_handle_break(port); |
René Bürgel | b651498 | 2008-12-21 02:54:31 -0700 | [diff] [blame] | 780 | port->icount.brk++; |
| 781 | } else if (status & MPC52xx_PSC_SR_PE) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 782 | flag = TTY_PARITY; |
René Bürgel | b651498 | 2008-12-21 02:54:31 -0700 | [diff] [blame] | 783 | port->icount.parity++; |
| 784 | } |
| 785 | else if (status & MPC52xx_PSC_SR_FE) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 786 | flag = TTY_FRAME; |
René Bürgel | b651498 | 2008-12-21 02:54:31 -0700 | [diff] [blame] | 787 | port->icount.frame++; |
| 788 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
| 790 | /* Clear error condition */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 791 | out_8(&PSC(port)->command, MPC52xx_PSC_RST_ERR_STAT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
| 793 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 794 | tty_insert_flip_char(tty, ch, flag); |
| 795 | if (status & MPC52xx_PSC_SR_OE) { |
| 796 | /* |
| 797 | * Overrun is special, since it's |
| 798 | * reported immediately, and doesn't |
| 799 | * affect the current character |
| 800 | */ |
| 801 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
René Bürgel | b651498 | 2008-12-21 02:54:31 -0700 | [diff] [blame] | 802 | port->icount.overrun++; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
| 805 | |
Andrew Liu | fbe543b | 2008-04-29 17:36:25 +1000 | [diff] [blame] | 806 | spin_unlock(&port->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | tty_flip_buffer_push(tty); |
Andrew Liu | fbe543b | 2008-04-29 17:36:25 +1000 | [diff] [blame] | 808 | spin_lock(&port->lock); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 809 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 810 | return psc_ops->raw_rx_rdy(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | static inline int |
| 814 | mpc52xx_uart_int_tx_chars(struct uart_port *port) |
| 815 | { |
| 816 | struct circ_buf *xmit = &port->info->xmit; |
| 817 | |
| 818 | /* Process out of band chars */ |
| 819 | if (port->x_char) { |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 820 | psc_ops->write_char(port, port->x_char); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | port->icount.tx++; |
| 822 | port->x_char = 0; |
| 823 | return 1; |
| 824 | } |
| 825 | |
| 826 | /* Nothing to do ? */ |
| 827 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 828 | mpc52xx_uart_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | return 0; |
| 830 | } |
| 831 | |
| 832 | /* Send chars */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 833 | while (psc_ops->raw_tx_rdy(port)) { |
| 834 | psc_ops->write_char(port, xmit->buf[xmit->tail]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 836 | port->icount.tx++; |
| 837 | if (uart_circ_empty(xmit)) |
| 838 | break; |
| 839 | } |
| 840 | |
| 841 | /* Wake up */ |
| 842 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 843 | uart_write_wakeup(port); |
| 844 | |
| 845 | /* Maybe we're done after all */ |
| 846 | if (uart_circ_empty(xmit)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 847 | mpc52xx_uart_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | return 1; |
| 852 | } |
| 853 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 854 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 855 | mpc52xx_uart_int(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | { |
Jeff Garzik | c7bec5a | 2006-10-06 15:00:58 -0400 | [diff] [blame] | 857 | struct uart_port *port = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | unsigned long pass = ISR_PASS_LIMIT; |
| 859 | unsigned int keepgoing; |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 860 | u8 status; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | spin_lock(&port->lock); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | /* While we have stuff to do, we continue */ |
| 865 | do { |
| 866 | /* If we don't find anything to do, we stop */ |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 867 | keepgoing = 0; |
| 868 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 869 | psc_ops->rx_clr_irq(port); |
| 870 | if (psc_ops->rx_rdy(port)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 871 | keepgoing |= mpc52xx_uart_int_rx_chars(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 873 | psc_ops->tx_clr_irq(port); |
| 874 | if (psc_ops->tx_rdy(port)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | keepgoing |= mpc52xx_uart_int_tx_chars(port); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 876 | |
Wolfram Sang | aec739e | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 877 | status = in_8(&PSC(port)->mpc52xx_psc_ipcr); |
| 878 | if (status & MPC52xx_PSC_D_DCD) |
| 879 | uart_handle_dcd_change(port, !(status & MPC52xx_PSC_DCD)); |
| 880 | |
| 881 | if (status & MPC52xx_PSC_D_CTS) |
| 882 | uart_handle_cts_change(port, !(status & MPC52xx_PSC_CTS)); |
| 883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | /* Limit number of iteration */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 885 | if (!(--pass)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | keepgoing = 0; |
| 887 | |
| 888 | } while (keepgoing); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | spin_unlock(&port->lock); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | return IRQ_HANDLED; |
| 893 | } |
| 894 | |
| 895 | |
| 896 | /* ======================================================================== */ |
| 897 | /* Console ( if applicable ) */ |
| 898 | /* ======================================================================== */ |
| 899 | |
| 900 | #ifdef CONFIG_SERIAL_MPC52xx_CONSOLE |
| 901 | |
| 902 | static void __init |
| 903 | mpc52xx_console_get_options(struct uart_port *port, |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 904 | int *baud, int *parity, int *bits, int *flow) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | { |
| 906 | struct mpc52xx_psc __iomem *psc = PSC(port); |
| 907 | unsigned char mr1; |
| 908 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 909 | pr_debug("mpc52xx_console_get_options(port=%p)\n", port); |
| 910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | /* Read the mode registers */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 912 | out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | mr1 = in_8(&psc->mode); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | /* CT{U,L}R are write-only ! */ |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 916 | *baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
| 918 | /* Parse them */ |
| 919 | switch (mr1 & MPC52xx_PSC_MODE_BITS_MASK) { |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 920 | case MPC52xx_PSC_MODE_5_BITS: |
| 921 | *bits = 5; |
| 922 | break; |
| 923 | case MPC52xx_PSC_MODE_6_BITS: |
| 924 | *bits = 6; |
| 925 | break; |
| 926 | case MPC52xx_PSC_MODE_7_BITS: |
| 927 | *bits = 7; |
| 928 | break; |
| 929 | case MPC52xx_PSC_MODE_8_BITS: |
| 930 | default: |
| 931 | *bits = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | } |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 933 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | if (mr1 & MPC52xx_PSC_MODE_PARNONE) |
| 935 | *parity = 'n'; |
| 936 | else |
| 937 | *parity = mr1 & MPC52xx_PSC_MODE_PARODD ? 'o' : 'e'; |
| 938 | } |
| 939 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 940 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | mpc52xx_console_write(struct console *co, const char *s, unsigned int count) |
| 942 | { |
| 943 | struct uart_port *port = &mpc52xx_uart_ports[co->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | unsigned int i, j; |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 945 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | /* Disable interrupts */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 947 | psc_ops->cw_disable_ints(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
| 949 | /* Wait the TX buffer to be empty */ |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 950 | j = 5000000; /* Maximum wait */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 951 | while (!mpc52xx_uart_tx_empty(port) && --j) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | udelay(1); |
| 953 | |
| 954 | /* Write all the chars */ |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 955 | for (i = 0; i < count; i++, s++) { |
| 956 | /* Line return handling */ |
| 957 | if (*s == '\n') |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 958 | psc_ops->write_char(port, '\r'); |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | /* Send the char */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 961 | psc_ops->write_char(port, *s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | /* Wait the TX buffer to be empty */ |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 964 | j = 20000; /* Maximum wait */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 965 | while (!mpc52xx_uart_tx_empty(port) && --j) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | udelay(1); |
| 967 | } |
| 968 | |
| 969 | /* Restore interrupt state */ |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 970 | psc_ops->cw_restore_ints(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 973 | |
| 974 | static int __init |
| 975 | mpc52xx_console_setup(struct console *co, char *options) |
| 976 | { |
| 977 | struct uart_port *port = &mpc52xx_uart_ports[co->index]; |
| 978 | struct device_node *np = mpc52xx_uart_nodes[co->index]; |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 979 | unsigned int uartclk; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 980 | struct resource res; |
| 981 | int ret; |
| 982 | |
| 983 | int baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD; |
| 984 | int bits = 8; |
| 985 | int parity = 'n'; |
| 986 | int flow = 'n'; |
| 987 | |
| 988 | pr_debug("mpc52xx_console_setup co=%p, co->index=%i, options=%s\n", |
| 989 | co, co->index, options); |
| 990 | |
Roel Kluin | b898f4f | 2009-05-28 14:34:29 -0700 | [diff] [blame] | 991 | if ((co->index < 0) || (co->index >= MPC52xx_PSC_MAXNUM)) { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 992 | pr_debug("PSC%x out of range\n", co->index); |
| 993 | return -EINVAL; |
| 994 | } |
| 995 | |
| 996 | if (!np) { |
| 997 | pr_debug("PSC%x not found in device tree\n", co->index); |
| 998 | return -EINVAL; |
| 999 | } |
| 1000 | |
| 1001 | pr_debug("Console on ttyPSC%x is %s\n", |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1002 | co->index, mpc52xx_uart_nodes[co->index]->full_name); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1003 | |
| 1004 | /* Fetch register locations */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1005 | ret = of_address_to_resource(np, 0, &res); |
| 1006 | if (ret) { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1007 | pr_debug("Could not get resources for PSC%x\n", co->index); |
| 1008 | return ret; |
| 1009 | } |
| 1010 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 1011 | uartclk = psc_ops->getuartclk(np); |
| 1012 | if (uartclk == 0) { |
| 1013 | pr_debug("Could not find uart clock frequency!\n"); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1014 | return -EINVAL; |
| 1015 | } |
| 1016 | |
| 1017 | /* Basic port init. Needed since we use some uart_??? func before |
| 1018 | * real init for early access */ |
| 1019 | spin_lock_init(&port->lock); |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 1020 | port->uartclk = uartclk; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1021 | port->ops = &mpc52xx_uart_ops; |
| 1022 | port->mapbase = res.start; |
| 1023 | port->membase = ioremap(res.start, sizeof(struct mpc52xx_psc)); |
| 1024 | port->irq = irq_of_parse_and_map(np, 0); |
| 1025 | |
| 1026 | if (port->membase == NULL) |
| 1027 | return -EINVAL; |
| 1028 | |
Grant Likely | 5dd80d5 | 2007-10-13 22:37:02 -0600 | [diff] [blame] | 1029 | pr_debug("mpc52xx-psc uart at %p, mapped to %p, irq=%x, freq=%i\n", |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1030 | (void *)port->mapbase, port->membase, |
| 1031 | port->irq, port->uartclk); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1032 | |
| 1033 | /* Setup the port parameters accoding to options */ |
| 1034 | if (options) |
| 1035 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1036 | else |
| 1037 | mpc52xx_console_get_options(port, &baud, &parity, &bits, &flow); |
| 1038 | |
| 1039 | pr_debug("Setting console parameters: %i %i%c1 flow=%c\n", |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1040 | baud, bits, parity, flow); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1041 | |
| 1042 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 1043 | } |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1044 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | |
Sylvain Munaut | 2d8179c | 2006-01-06 00:11:31 -0800 | [diff] [blame] | 1046 | static struct uart_driver mpc52xx_uart_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
| 1048 | static struct console mpc52xx_console = { |
Sylvain Munaut | d62de3a | 2006-01-06 00:11:32 -0800 | [diff] [blame] | 1049 | .name = "ttyPSC", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | .write = mpc52xx_console_write, |
| 1051 | .device = uart_console_device, |
| 1052 | .setup = mpc52xx_console_setup, |
| 1053 | .flags = CON_PRINTBUFFER, |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1054 | .index = -1, /* Specified on the cmdline (e.g. console=ttyPSC0) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | .data = &mpc52xx_uart_driver, |
| 1056 | }; |
| 1057 | |
Grant Likely | 9b9129e | 2006-11-27 14:21:01 -0700 | [diff] [blame] | 1058 | |
| 1059 | static int __init |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | mpc52xx_console_init(void) |
| 1061 | { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1062 | mpc52xx_uart_of_enumerate(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | register_console(&mpc52xx_console); |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | console_initcall(mpc52xx_console_init); |
| 1068 | |
| 1069 | #define MPC52xx_PSC_CONSOLE &mpc52xx_console |
| 1070 | #else |
| 1071 | #define MPC52xx_PSC_CONSOLE NULL |
| 1072 | #endif |
| 1073 | |
| 1074 | |
| 1075 | /* ======================================================================== */ |
| 1076 | /* UART Driver */ |
| 1077 | /* ======================================================================== */ |
| 1078 | |
| 1079 | static struct uart_driver mpc52xx_uart_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | .driver_name = "mpc52xx_psc_uart", |
Sylvain Munaut | d62de3a | 2006-01-06 00:11:32 -0800 | [diff] [blame] | 1081 | .dev_name = "ttyPSC", |
Sylvain Munaut | d62de3a | 2006-01-06 00:11:32 -0800 | [diff] [blame] | 1082 | .major = SERIAL_PSC_MAJOR, |
| 1083 | .minor = SERIAL_PSC_MINOR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | .nr = MPC52xx_PSC_MAXNUM, |
| 1085 | .cons = MPC52xx_PSC_CONSOLE, |
| 1086 | }; |
| 1087 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1088 | /* ======================================================================== */ |
| 1089 | /* OF Platform Driver */ |
| 1090 | /* ======================================================================== */ |
| 1091 | |
Grant Likely | 52b8048 | 2008-02-06 22:29:25 -0700 | [diff] [blame] | 1092 | static struct of_device_id mpc52xx_uart_of_match[] = { |
| 1093 | #ifdef CONFIG_PPC_MPC52xx |
| 1094 | { .compatible = "fsl,mpc5200-psc-uart", .data = &mpc52xx_psc_ops, }, |
| 1095 | /* binding used by old lite5200 device trees: */ |
| 1096 | { .compatible = "mpc5200-psc-uart", .data = &mpc52xx_psc_ops, }, |
| 1097 | /* binding used by efika: */ |
| 1098 | { .compatible = "mpc5200-serial", .data = &mpc52xx_psc_ops, }, |
| 1099 | #endif |
| 1100 | #ifdef CONFIG_PPC_MPC512x |
| 1101 | { .compatible = "fsl,mpc5121-psc-uart", .data = &mpc512x_psc_ops, }, |
Grant Likely | 52b8048 | 2008-02-06 22:29:25 -0700 | [diff] [blame] | 1102 | #endif |
Grant Likely | bc775ea | 2008-04-29 06:40:37 -0600 | [diff] [blame] | 1103 | {}, |
Grant Likely | 52b8048 | 2008-02-06 22:29:25 -0700 | [diff] [blame] | 1104 | }; |
| 1105 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1106 | static int __devinit |
| 1107 | mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match) |
| 1108 | { |
| 1109 | int idx = -1; |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 1110 | unsigned int uartclk; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1111 | struct uart_port *port = NULL; |
| 1112 | struct resource res; |
| 1113 | int ret; |
| 1114 | |
| 1115 | dev_dbg(&op->dev, "mpc52xx_uart_probe(op=%p, match=%p)\n", op, match); |
| 1116 | |
| 1117 | /* Check validity & presence */ |
| 1118 | for (idx = 0; idx < MPC52xx_PSC_MAXNUM; idx++) |
| 1119 | if (mpc52xx_uart_nodes[idx] == op->node) |
| 1120 | break; |
| 1121 | if (idx >= MPC52xx_PSC_MAXNUM) |
| 1122 | return -EINVAL; |
| 1123 | pr_debug("Found %s assigned to ttyPSC%x\n", |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1124 | mpc52xx_uart_nodes[idx]->full_name, idx); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1125 | |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 1126 | uartclk = psc_ops->getuartclk(op->node); |
| 1127 | if (uartclk == 0) { |
| 1128 | dev_dbg(&op->dev, "Could not find uart clock frequency!\n"); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1129 | return -EINVAL; |
| 1130 | } |
| 1131 | |
| 1132 | /* Init the port structure */ |
| 1133 | port = &mpc52xx_uart_ports[idx]; |
| 1134 | |
| 1135 | spin_lock_init(&port->lock); |
John Rigby | 599f030 | 2008-01-29 04:28:55 +1100 | [diff] [blame] | 1136 | port->uartclk = uartclk; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1137 | port->fifosize = 512; |
| 1138 | port->iotype = UPIO_MEM; |
| 1139 | port->flags = UPF_BOOT_AUTOCONF | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1140 | (uart_console(port) ? 0 : UPF_IOREMAP); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1141 | port->line = idx; |
| 1142 | port->ops = &mpc52xx_uart_ops; |
| 1143 | port->dev = &op->dev; |
| 1144 | |
| 1145 | /* Search for IRQ and mapbase */ |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1146 | ret = of_address_to_resource(op->node, 0, &res); |
| 1147 | if (ret) |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1148 | return ret; |
| 1149 | |
| 1150 | port->mapbase = res.start; |
Wolfram Sang | 418441d9 | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 1151 | if (!port->mapbase) { |
| 1152 | dev_dbg(&op->dev, "Could not allocate resources for PSC\n"); |
| 1153 | return -EINVAL; |
| 1154 | } |
| 1155 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1156 | port->irq = irq_of_parse_and_map(op->node, 0); |
Wolfram Sang | 418441d9 | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 1157 | if (port->irq == NO_IRQ) { |
| 1158 | dev_dbg(&op->dev, "Could not get irq\n"); |
| 1159 | return -EINVAL; |
| 1160 | } |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1161 | |
Grant Likely | 5dd80d5 | 2007-10-13 22:37:02 -0600 | [diff] [blame] | 1162 | dev_dbg(&op->dev, "mpc52xx-psc uart at %p, irq=%x, freq=%i\n", |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1163 | (void *)port->mapbase, port->irq, port->uartclk); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1164 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1165 | /* Add the port to the uart sub-system */ |
| 1166 | ret = uart_add_one_port(&mpc52xx_uart_driver, port); |
Wolfram Sang | 418441d9 | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 1167 | if (ret) { |
| 1168 | irq_dispose_mapping(port->irq); |
| 1169 | return ret; |
| 1170 | } |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1171 | |
Wolfram Sang | 418441d9 | 2008-12-21 02:54:32 -0700 | [diff] [blame] | 1172 | dev_set_drvdata(&op->dev, (void *)port); |
| 1173 | return 0; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | static int |
| 1177 | mpc52xx_uart_of_remove(struct of_device *op) |
| 1178 | { |
| 1179 | struct uart_port *port = dev_get_drvdata(&op->dev); |
| 1180 | dev_set_drvdata(&op->dev, NULL); |
| 1181 | |
Sylvain Munaut | fc7900b | 2007-02-15 23:18:08 +0100 | [diff] [blame] | 1182 | if (port) { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1183 | uart_remove_one_port(&mpc52xx_uart_driver, port); |
Sylvain Munaut | fc7900b | 2007-02-15 23:18:08 +0100 | [diff] [blame] | 1184 | irq_dispose_mapping(port->irq); |
| 1185 | } |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1186 | |
| 1187 | return 0; |
| 1188 | } |
| 1189 | |
| 1190 | #ifdef CONFIG_PM |
| 1191 | static int |
| 1192 | mpc52xx_uart_of_suspend(struct of_device *op, pm_message_t state) |
| 1193 | { |
| 1194 | struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev); |
| 1195 | |
| 1196 | if (port) |
| 1197 | uart_suspend_port(&mpc52xx_uart_driver, port); |
| 1198 | |
| 1199 | return 0; |
| 1200 | } |
| 1201 | |
| 1202 | static int |
| 1203 | mpc52xx_uart_of_resume(struct of_device *op) |
| 1204 | { |
| 1205 | struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev); |
| 1206 | |
| 1207 | if (port) |
| 1208 | uart_resume_port(&mpc52xx_uart_driver, port); |
| 1209 | |
| 1210 | return 0; |
| 1211 | } |
| 1212 | #endif |
| 1213 | |
| 1214 | static void |
Grant Likely | 3b5ebf8 | 2009-02-03 12:30:25 -0700 | [diff] [blame] | 1215 | mpc52xx_uart_of_assign(struct device_node *np) |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1216 | { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1217 | int i; |
| 1218 | |
Grant Likely | 3b5ebf8 | 2009-02-03 12:30:25 -0700 | [diff] [blame] | 1219 | /* Find the first free PSC number */ |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1220 | for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) { |
| 1221 | if (mpc52xx_uart_nodes[i] == NULL) { |
Grant Likely | 3b5ebf8 | 2009-02-03 12:30:25 -0700 | [diff] [blame] | 1222 | of_node_get(np); |
| 1223 | mpc52xx_uart_nodes[i] = np; |
| 1224 | return; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1225 | } |
| 1226 | } |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1227 | } |
| 1228 | |
| 1229 | static void |
| 1230 | mpc52xx_uart_of_enumerate(void) |
| 1231 | { |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1232 | static int enum_done; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1233 | struct device_node *np; |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 1234 | const struct of_device_id *match; |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1235 | int i; |
| 1236 | |
| 1237 | if (enum_done) |
| 1238 | return; |
| 1239 | |
Grant Likely | 3b5ebf8 | 2009-02-03 12:30:25 -0700 | [diff] [blame] | 1240 | /* Assign index to each PSC in device tree */ |
| 1241 | for_each_matching_node(np, mpc52xx_uart_of_match) { |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 1242 | match = of_match_node(mpc52xx_uart_of_match, np); |
John Rigby | 25ae3a0 | 2008-01-29 04:28:56 +1100 | [diff] [blame] | 1243 | psc_ops = match->data; |
Grant Likely | 3b5ebf8 | 2009-02-03 12:30:25 -0700 | [diff] [blame] | 1244 | mpc52xx_uart_of_assign(np); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1245 | } |
| 1246 | |
| 1247 | enum_done = 1; |
| 1248 | |
| 1249 | for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) { |
| 1250 | if (mpc52xx_uart_nodes[i]) |
| 1251 | pr_debug("%s assigned to ttyPSC%x\n", |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1252 | mpc52xx_uart_nodes[i]->full_name, i); |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | MODULE_DEVICE_TABLE(of, mpc52xx_uart_of_match); |
| 1257 | |
| 1258 | static struct of_platform_driver mpc52xx_uart_of_driver = { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1259 | .match_table = mpc52xx_uart_of_match, |
| 1260 | .probe = mpc52xx_uart_of_probe, |
| 1261 | .remove = mpc52xx_uart_of_remove, |
| 1262 | #ifdef CONFIG_PM |
| 1263 | .suspend = mpc52xx_uart_of_suspend, |
| 1264 | .resume = mpc52xx_uart_of_resume, |
| 1265 | #endif |
| 1266 | .driver = { |
| 1267 | .name = "mpc52xx-psc-uart", |
| 1268 | }, |
| 1269 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
| 1271 | |
| 1272 | /* ======================================================================== */ |
| 1273 | /* Module */ |
| 1274 | /* ======================================================================== */ |
| 1275 | |
| 1276 | static int __init |
| 1277 | mpc52xx_uart_init(void) |
| 1278 | { |
| 1279 | int ret; |
| 1280 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1281 | printk(KERN_INFO "Serial: MPC52xx PSC UART driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
John Rigby | 406b7d4 | 2008-01-17 08:37:25 +1100 | [diff] [blame] | 1283 | ret = uart_register_driver(&mpc52xx_uart_driver); |
| 1284 | if (ret) { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1285 | printk(KERN_ERR "%s: uart_register_driver failed (%i)\n", |
| 1286 | __FILE__, ret); |
| 1287 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | } |
| 1289 | |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1290 | mpc52xx_uart_of_enumerate(); |
| 1291 | |
| 1292 | ret = of_register_platform_driver(&mpc52xx_uart_of_driver); |
| 1293 | if (ret) { |
| 1294 | printk(KERN_ERR "%s: of_register_platform_driver failed (%i)\n", |
| 1295 | __FILE__, ret); |
| 1296 | uart_unregister_driver(&mpc52xx_uart_driver); |
| 1297 | return ret; |
| 1298 | } |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1299 | |
| 1300 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
| 1302 | |
| 1303 | static void __exit |
| 1304 | mpc52xx_uart_exit(void) |
| 1305 | { |
Grant Likely | b9272df | 2006-11-27 14:21:02 -0700 | [diff] [blame] | 1306 | of_unregister_platform_driver(&mpc52xx_uart_of_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | uart_unregister_driver(&mpc52xx_uart_driver); |
| 1308 | } |
| 1309 | |
| 1310 | |
| 1311 | module_init(mpc52xx_uart_init); |
| 1312 | module_exit(mpc52xx_uart_exit); |
| 1313 | |
| 1314 | MODULE_AUTHOR("Sylvain Munaut <tnt@246tNt.com>"); |
| 1315 | MODULE_DESCRIPTION("Freescale MPC52xx PSC UART"); |
| 1316 | MODULE_LICENSE("GPL"); |