Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mmc/host/tmio_mmc.h |
| 3 | * |
| 4 | * Copyright (C) 2007 Ian Molton |
| 5 | * Copyright (C) 2004 Ian Molton |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * Driver for the MMC / SD / SDIO cell found in: |
| 12 | * |
| 13 | * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 |
| 14 | */ |
| 15 | |
| 16 | #ifndef TMIO_MMC_H |
| 17 | #define TMIO_MMC_H |
| 18 | |
| 19 | #include <linux/highmem.h> |
Simon Horman | cba179a | 2011-03-24 09:48:36 +0100 | [diff] [blame] | 20 | #include <linux/mmc/tmio.h> |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 21 | #include <linux/mutex.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 22 | #include <linux/pagemap.h> |
Rafael J. Wysocki | 6c0cbef | 2011-07-26 20:50:23 +0200 | [diff] [blame] | 23 | #include <linux/scatterlist.h> |
Guennadi Liakhovetski | e3de2be | 2012-01-06 13:06:51 +0100 | [diff] [blame] | 24 | #include <linux/spinlock.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 25 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 26 | /* Definitions for values the CTRL_SDIO_STATUS register can take. */ |
Simon Horman | cba179a | 2011-03-24 09:48:36 +0100 | [diff] [blame] | 27 | #define TMIO_SDIO_STAT_IOIRQ 0x0001 |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 28 | #define TMIO_SDIO_STAT_EXPUB52 0x4000 |
Simon Horman | cba179a | 2011-03-24 09:48:36 +0100 | [diff] [blame] | 29 | #define TMIO_SDIO_STAT_EXWT 0x8000 |
| 30 | #define TMIO_SDIO_MASK_ALL 0xc007 |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 31 | |
| 32 | /* Define some IRQ masks */ |
| 33 | /* This is the mask used at reset by the chip */ |
| 34 | #define TMIO_MASK_ALL 0x837f031d |
| 35 | #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) |
| 36 | #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) |
| 37 | #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ |
| 38 | TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) |
| 39 | #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) |
| 40 | |
| 41 | struct tmio_mmc_data; |
| 42 | |
| 43 | struct tmio_mmc_host { |
| 44 | void __iomem *ctl; |
| 45 | unsigned long bus_shift; |
| 46 | struct mmc_command *cmd; |
| 47 | struct mmc_request *mrq; |
| 48 | struct mmc_data *data; |
| 49 | struct mmc_host *mmc; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 50 | |
Guennadi Liakhovetski | c391e1b | 2012-02-09 22:57:13 +0100 | [diff] [blame] | 51 | /* Controller power state */ |
| 52 | bool power; |
| 53 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 54 | /* Callbacks for clock / power control */ |
| 55 | void (*set_pwr)(struct platform_device *host, int state); |
| 56 | void (*set_clk_div)(struct platform_device *host, int state); |
| 57 | |
| 58 | /* pio related stuff */ |
| 59 | struct scatterlist *sg_ptr; |
| 60 | struct scatterlist *sg_orig; |
| 61 | unsigned int sg_len; |
| 62 | unsigned int sg_off; |
| 63 | |
| 64 | struct platform_device *pdev; |
| 65 | struct tmio_mmc_data *pdata; |
| 66 | |
| 67 | /* DMA support */ |
| 68 | bool force_pio; |
| 69 | struct dma_chan *chan_rx; |
| 70 | struct dma_chan *chan_tx; |
| 71 | struct tasklet_struct dma_complete; |
| 72 | struct tasklet_struct dma_issue; |
| 73 | struct scatterlist bounce_sg; |
| 74 | u8 *bounce_buf; |
| 75 | |
| 76 | /* Track lost interrupts */ |
| 77 | struct delayed_work delayed_reset_work; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 78 | struct work_struct done; |
| 79 | |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 80 | /* Cache IRQ mask */ |
| 81 | u32 sdcard_irq_mask; |
| 82 | u32 sdio_irq_mask; |
| 83 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 84 | spinlock_t lock; /* protect host private data */ |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 85 | unsigned long last_req_ts; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 86 | struct mutex ios_lock; /* protect set_ios() context */ |
Guennadi Liakhovetski | 2b1ac5c | 2012-02-09 22:57:08 +0100 | [diff] [blame] | 87 | bool native_hotplug; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 88 | }; |
| 89 | |
| 90 | int tmio_mmc_host_probe(struct tmio_mmc_host **host, |
| 91 | struct platform_device *pdev, |
| 92 | struct tmio_mmc_data *pdata); |
| 93 | void tmio_mmc_host_remove(struct tmio_mmc_host *host); |
| 94 | void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); |
| 95 | |
| 96 | void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); |
| 97 | void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 98 | irqreturn_t tmio_mmc_irq(int irq, void *devid); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame] | 99 | irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); |
| 100 | irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); |
| 101 | irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 102 | |
| 103 | static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, |
| 104 | unsigned long *flags) |
| 105 | { |
| 106 | local_irq_save(*flags); |
Cong Wang | 482fce9 | 2011-11-27 13:27:00 +0800 | [diff] [blame] | 107 | return kmap_atomic(sg_page(sg)) + sg->offset; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, |
| 111 | unsigned long *flags, void *virt) |
| 112 | { |
Cong Wang | 482fce9 | 2011-11-27 13:27:00 +0800 | [diff] [blame] | 113 | kunmap_atomic(virt - sg->offset); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 114 | local_irq_restore(*flags); |
| 115 | } |
| 116 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 117 | #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 118 | void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); |
Guennadi Liakhovetski | 162f43e | 2011-07-14 18:39:10 +0200 | [diff] [blame] | 119 | void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 120 | void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); |
| 121 | void tmio_mmc_release_dma(struct tmio_mmc_host *host); |
Guennadi Liakhovetski | e3de2be | 2012-01-06 13:06:51 +0100 | [diff] [blame] | 122 | void tmio_mmc_abort_dma(struct tmio_mmc_host *host); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 123 | #else |
| 124 | static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, |
| 125 | struct mmc_data *data) |
| 126 | { |
| 127 | } |
| 128 | |
Guennadi Liakhovetski | 162f43e | 2011-07-14 18:39:10 +0200 | [diff] [blame] | 129 | static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) |
| 130 | { |
| 131 | } |
| 132 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 133 | static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, |
| 134 | struct tmio_mmc_data *pdata) |
| 135 | { |
| 136 | host->chan_tx = NULL; |
| 137 | host->chan_rx = NULL; |
| 138 | } |
| 139 | |
| 140 | static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) |
| 141 | { |
| 142 | } |
Guennadi Liakhovetski | e3de2be | 2012-01-06 13:06:51 +0100 | [diff] [blame] | 143 | |
| 144 | static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) |
| 145 | { |
| 146 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 147 | #endif |
| 148 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 149 | #ifdef CONFIG_PM |
| 150 | int tmio_mmc_host_suspend(struct device *dev); |
| 151 | int tmio_mmc_host_resume(struct device *dev); |
| 152 | #else |
| 153 | #define tmio_mmc_host_suspend NULL |
| 154 | #define tmio_mmc_host_resume NULL |
| 155 | #endif |
| 156 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 157 | int tmio_mmc_host_runtime_suspend(struct device *dev); |
| 158 | int tmio_mmc_host_runtime_resume(struct device *dev); |
| 159 | |
Simon Horman | a11862d | 2011-06-21 08:00:09 +0900 | [diff] [blame] | 160 | static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) |
| 161 | { |
| 162 | return readw(host->ctl + (addr << host->bus_shift)); |
| 163 | } |
| 164 | |
| 165 | static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, |
| 166 | u16 *buf, int count) |
| 167 | { |
| 168 | readsw(host->ctl + (addr << host->bus_shift), buf, count); |
| 169 | } |
| 170 | |
| 171 | static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) |
| 172 | { |
| 173 | return readw(host->ctl + (addr << host->bus_shift)) | |
| 174 | readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; |
| 175 | } |
| 176 | |
| 177 | static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) |
| 178 | { |
Simon Horman | 973ed3a | 2011-06-21 08:00:10 +0900 | [diff] [blame] | 179 | /* If there is a hook and it returns non-zero then there |
| 180 | * is an error and the write should be skipped |
| 181 | */ |
| 182 | if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr)) |
| 183 | return; |
Simon Horman | a11862d | 2011-06-21 08:00:09 +0900 | [diff] [blame] | 184 | writew(val, host->ctl + (addr << host->bus_shift)); |
| 185 | } |
| 186 | |
| 187 | static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, |
| 188 | u16 *buf, int count) |
| 189 | { |
| 190 | writesw(host->ctl + (addr << host->bus_shift), buf, count); |
| 191 | } |
| 192 | |
| 193 | static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) |
| 194 | { |
| 195 | writew(val, host->ctl + (addr << host->bus_shift)); |
| 196 | writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); |
| 197 | } |
| 198 | |
| 199 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 200 | #endif |