diff options
Diffstat (limited to 'drivers/mmc/wbsd.c')
| -rw-r--r-- | drivers/mmc/wbsd.c | 548 |
1 files changed, 305 insertions, 243 deletions
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c index 402c2d661fb2..3cbca7cbea80 100644 --- a/drivers/mmc/wbsd.c +++ b/drivers/mmc/wbsd.c @@ -42,7 +42,7 @@ #include "wbsd.h" #define DRIVER_NAME "wbsd" -#define DRIVER_VERSION "1.3" +#define DRIVER_VERSION "1.4" #ifdef CONFIG_MMC_DEBUG #define DBG(x...) \ @@ -93,7 +93,7 @@ static int dma = 2; static inline void wbsd_unlock_config(struct wbsd_host* host) { BUG_ON(host->config == 0); - + outb(host->unlock_code, host->config); outb(host->unlock_code, host->config); } @@ -101,14 +101,14 @@ static inline void wbsd_unlock_config(struct wbsd_host* host) static inline void wbsd_lock_config(struct wbsd_host* host) { BUG_ON(host->config == 0); - + outb(LOCK_CODE, host->config); } static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value) { BUG_ON(host->config == 0); - + outb(reg, host->config); outb(value, host->config + 1); } @@ -116,7 +116,7 @@ static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value) static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg) { BUG_ON(host->config == 0); - + outb(reg, host->config); return inb(host->config + 1); } @@ -140,21 +140,21 @@ static inline u8 wbsd_read_index(struct wbsd_host* host, u8 index) static void wbsd_init_device(struct wbsd_host* host) { u8 setup, ier; - + /* * Reset chip (SD/MMC part) and fifo. */ setup = wbsd_read_index(host, WBSD_IDX_SETUP); setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET; wbsd_write_index(host, WBSD_IDX_SETUP, setup); - + /* * Set DAT3 to input */ setup &= ~WBSD_DAT3_H; wbsd_write_index(host, WBSD_IDX_SETUP, setup); host->flags &= ~WBSD_FIGNORE_DETECT; - + /* * Read back default clock. */ @@ -164,12 +164,12 @@ static void wbsd_init_device(struct wbsd_host* host) * Power down port. */ outb(WBSD_POWER_N, host->base + WBSD_CSR); - + /* * Set maximum timeout. */ wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F); - + /* * Test for card presence */ @@ -177,7 +177,7 @@ static void wbsd_init_device(struct wbsd_host* host) host->flags |= WBSD_FCARD_PRESENT; else host->flags &= ~WBSD_FCARD_PRESENT; - + /* * Enable interesting interrupts. */ @@ -200,9 +200,9 @@ static void wbsd_init_device(struct wbsd_host* host) static void wbsd_reset(struct wbsd_host* host) { u8 setup; - + printk(KERN_ERR DRIVER_NAME ": Resetting chip\n"); - + /* * Soft reset of chip (SD/MMC part). */ @@ -214,9 +214,9 @@ static void wbsd_reset(struct wbsd_host* host) static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq) { unsigned long dmaflags; - + DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode); - + if (host->dma >= 0) { /* @@ -232,7 +232,7 @@ static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq) */ wbsd_write_index(host, WBSD_IDX_DMA, 0); } - + host->mrq = NULL; /* @@ -275,7 +275,7 @@ static inline int wbsd_next_sg(struct wbsd_host* host) host->offset = 0; host->remain = host->cur_sg->length; } - + return host->num_sg; } @@ -297,12 +297,12 @@ static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data) struct scatterlist* sg; char* dmabuf = host->dma_buffer; char* sgbuf; - + size = host->size; - + sg = data->sg; len = data->sg_len; - + /* * Just loop through all entries. Size might not * be the entire list though so make sure that @@ -317,23 +317,23 @@ static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data) memcpy(dmabuf, sgbuf, sg[i].length); kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); dmabuf += sg[i].length; - + if (size < sg[i].length) size = 0; else size -= sg[i].length; - + if (size == 0) break; } - + /* * Check that we didn't get a request to transfer * more data than can fit into the SG list. */ - + BUG_ON(size != 0); - + host->size -= size; } @@ -343,12 +343,12 @@ static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data) struct scatterlist* sg; char* dmabuf = host->dma_buffer; char* sgbuf; - + size = host->size; - + sg = data->sg; len = data->sg_len; - + /* * Just loop through all entries. Size might not * be the entire list though so make sure that @@ -363,30 +363,30 @@ static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data) memcpy(sgbuf, dmabuf, sg[i].length); kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); dmabuf += sg[i].length; - + if (size < sg[i].length) size = 0; else size -= sg[i].length; - + if (size == 0) break; } - + /* * Check that we didn't get a request to transfer * more data than can fit into the SG list. */ - + BUG_ON(size != 0); - + host->size -= size; } /* * Command handling */ - + static inline void wbsd_get_short_reply(struct wbsd_host* host, struct mmc_command* cmd) { @@ -398,7 +398,7 @@ static inline void wbsd_get_short_reply(struct wbsd_host* host, cmd->error = MMC_ERR_INVALID; return; } - + cmd->resp[0] = wbsd_read_index(host, WBSD_IDX_RESP12) << 24; cmd->resp[0] |= @@ -415,7 +415,7 @@ static inline void wbsd_get_long_reply(struct wbsd_host* host, struct mmc_command* cmd) { int i; - + /* * Correct response type? */ @@ -424,7 +424,7 @@ static inline void wbsd_get_long_reply(struct wbsd_host* host, cmd->error = MMC_ERR_INVALID; return; } - + for (i = 0;i < 4;i++) { cmd->resp[i] = @@ -442,7 +442,7 @@ static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) { int i; u8 status, isr; - + DBGF("Sending cmd (%x)\n", cmd->opcode); /* @@ -451,16 +451,16 @@ static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) * transfer. */ host->isr = 0; - + /* * Send the command (CRC calculated by host). */ outb(cmd->opcode, host->base + WBSD_CMDR); for (i = 3;i >= 0;i--) outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR); - + cmd->error = MMC_ERR_NONE; - + /* * Wait for the request to complete. */ @@ -477,7 +477,7 @@ static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) * Read back status. */ isr = host->isr; - + /* Card removed? */ if (isr & WBSD_INT_CARD) cmd->error = MMC_ERR_TIMEOUT; @@ -509,13 +509,13 @@ static void wbsd_empty_fifo(struct wbsd_host* host) struct mmc_data* data = host->mrq->cmd->data; char* buffer; int i, fsr, fifo; - + /* * Handle excessive data. */ if (data->bytes_xfered == host->size) return; - + buffer = wbsd_kmap_sg(host) + host->offset; /* @@ -527,14 +527,14 @@ static void wbsd_empty_fifo(struct wbsd_host* host) /* * The size field in the FSR is broken so we have to * do some guessing. - */ + */ if (fsr & WBSD_FIFO_FULL) fifo = 16; else if (fsr & WBSD_FIFO_FUTHRE) fifo = 8; else fifo = 1; - + for (i = 0;i < fifo;i++) { *buffer = inb(host->base + WBSD_DFR); @@ -543,23 +543,23 @@ static void wbsd_empty_fifo(struct wbsd_host* host) host->remain--; data->bytes_xfered++; - + /* * Transfer done? */ if (data->bytes_xfered == host->size) { - wbsd_kunmap_sg(host); + wbsd_kunmap_sg(host); return; } - + /* * End of scatter list entry? */ if (host->remain == 0) { wbsd_kunmap_sg(host); - + /* * Get next entry. Check if last. */ @@ -572,17 +572,17 @@ static void wbsd_empty_fifo(struct wbsd_host* host) * into the scatter list. */ BUG_ON(1); - + host->size = data->bytes_xfered; - + return; } - + buffer = wbsd_kmap_sg(host); } } } - + wbsd_kunmap_sg(host); /* @@ -599,7 +599,7 @@ static void wbsd_fill_fifo(struct wbsd_host* host) struct mmc_data* data = host->mrq->cmd->data; char* buffer; int i, fsr, fifo; - + /* * Check that we aren't being called after the * entire buffer has been transfered. @@ -618,7 +618,7 @@ static void wbsd_fill_fifo(struct wbsd_host* host) /* * The size field in the FSR is broken so we have to * do some guessing. - */ + */ if (fsr & WBSD_FIFO_EMPTY) fifo = 0; else if (fsr & WBSD_FIFO_EMTHRE) @@ -632,9 +632,9 @@ static void wbsd_fill_fifo(struct wbsd_host* host) buffer++; host->offset++; host->remain--; - + data->bytes_xfered++; - + /* * Transfer done? */ @@ -650,7 +650,7 @@ static void wbsd_fill_fifo(struct wbsd_host* host) if (host->remain == 0) { wbsd_kunmap_sg(host); - + /* * Get next entry. Check if last. */ @@ -663,19 +663,19 @@ static void wbsd_fill_fifo(struct wbsd_host* host) * into the scatter list. */ BUG_ON(1); - + host->size = data->bytes_xfered; - + return; } - + buffer = wbsd_kmap_sg(host); } } } - + wbsd_kunmap_sg(host); - + /* * The controller stops sending interrupts for * 'FIFO empty' under certain conditions. So we @@ -694,7 +694,7 @@ static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) 1 << data->blksz_bits, data->blocks, data->flags); DBGF("tsac %d ms nsac %d clk\n", data->timeout_ns / 1000000, data->timeout_clks); - + /* * Calculate size. */ @@ -708,23 +708,40 @@ static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) wbsd_write_index(host, WBSD_IDX_TAAC, 127); else wbsd_write_index(host, WBSD_IDX_TAAC, data->timeout_ns/1000000); - + if (data->timeout_clks > 255) wbsd_write_index(host, WBSD_IDX_NSAC, 255); else wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks); - + /* * Inform the chip of how large blocks will be * sent. It needs this to determine when to * calculate CRC. * * Space for CRC must be included in the size. + * Two bytes are needed for each data line. */ - blksize = (1 << data->blksz_bits) + 2; - - wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0); - wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); + if (host->bus_width == MMC_BUS_WIDTH_1) + { + blksize = (1 << data->blksz_bits) + 2; + + wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0); + wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); + } + else if (host->bus_width == MMC_BUS_WIDTH_4) + { + blksize = (1 << data->blksz_bits) + 2 * 4; + + wbsd_write_index(host, WBSD_IDX_PBSMSB, ((blksize >> 4) & 0xF0) + | WBSD_DATA_WIDTH); + wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); + } + else + { + data->error = MMC_ERR_INVALID; + return; + } /* * Clear the FIFO. This is needed even for DMA @@ -734,12 +751,12 @@ static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) setup = wbsd_read_index(host, WBSD_IDX_SETUP); setup |= WBSD_FIFO_RESET; wbsd_write_index(host, WBSD_IDX_SETUP, setup); - + /* * DMA transfer? */ if (host->dma >= 0) - { + { /* * The buffer for DMA is only 64 kB. */ @@ -749,17 +766,17 @@ static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) data->error = MMC_ERR_INVALID; return; } - + /* * Transfer data from the SG list to * the DMA buffer. */ if (data->flags & MMC_DATA_WRITE) wbsd_sg_to_dma(host, data); - + /* * Initialise the ISA DMA controller. - */ + */ dmaflags = claim_dma_lock(); disable_dma(host->dma); clear_dma_ff(host->dma); @@ -785,17 +802,17 @@ static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) * output to a minimum. */ host->firsterr = 1; - + /* * Initialise the SG list. */ wbsd_init_sg(host, data); - + /* * Turn off DMA. */ wbsd_write_index(host, WBSD_IDX_DMA, 0); - + /* * Set up FIFO threshold levels (and fill * buffer if doing a write). @@ -811,8 +828,8 @@ static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) WBSD_FIFOEN_EMPTY | 8); wbsd_fill_fifo(host); } - } - + } + data->error = MMC_ERR_NONE; } @@ -821,7 +838,7 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) unsigned long dmaflags; int count; u8 status; - + WARN_ON(host->mrq == NULL); /* @@ -838,7 +855,7 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) { status = wbsd_read_index(host, WBSD_IDX_STATUS); } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE)); - + /* * DMA transfer? */ @@ -848,7 +865,7 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) * Disable DMA on the host. */ wbsd_write_index(host, WBSD_IDX_DMA, 0); - + /* * Turn of ISA DMA controller. */ @@ -857,7 +874,7 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) clear_dma_ff(host->dma); count = get_dma_residue(host->dma); release_dma_lock(dmaflags); - + /* * Any leftover data? */ @@ -865,7 +882,7 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) { printk(KERN_ERR DRIVER_NAME ": Incomplete DMA " "transfer. %d bytes left.\n", count); - + data->error = MMC_ERR_FAILED; } else @@ -876,13 +893,13 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) */ if (data->flags & MMC_DATA_READ) wbsd_dma_to_sg(host, data); - + data->bytes_xfered = host->size; } } - + DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered); - + wbsd_request_end(host, host->mrq); } @@ -907,7 +924,7 @@ static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) cmd = mrq->cmd; host->mrq = mrq; - + /* * If there is no card in the slot then * timeout immediatly. @@ -924,18 +941,18 @@ static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) if (cmd->data) { wbsd_prepare_data(host, cmd->data); - + if (cmd->data->error != MMC_ERR_NONE) goto done; } - + wbsd_send_command(host, cmd); /* * If this is a data transfer the request * will be finished after the data has * transfered. - */ + */ if (cmd->data && (cmd->error == MMC_ERR_NONE)) { /* @@ -948,7 +965,7 @@ static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) return; } - + done: wbsd_request_end(host, mrq); @@ -959,9 +976,10 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) { struct wbsd_host* host = mmc_priv(mmc); u8 clk, setup, pwr; - - DBGF("clock %uHz busmode %u powermode %u Vdd %u\n", - ios->clock, ios->bus_mode, ios->power_mode, ios->vdd); + + DBGF("clock %uHz busmode %u powermode %u cs %u Vdd %u width %u\n", + ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select, + ios->vdd, ios->bus_width); spin_lock_bh(&host->lock); @@ -971,7 +989,7 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) */ if (ios->power_mode == MMC_POWER_OFF) wbsd_init_device(host); - + if (ios->clock >= 24000000) clk = WBSD_CLK_24M; else if (ios->clock >= 16000000) @@ -1003,30 +1021,63 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) /* * MMC cards need to have pin 1 high during init. - * Init time corresponds rather nicely with the bus mode. * It wreaks havoc with the card detection though so - * that needs to be disabed. + * that needs to be disabled. */ setup = wbsd_read_index(host, WBSD_IDX_SETUP); - if ((ios->power_mode == MMC_POWER_ON) && - (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)) + if (ios->chip_select == MMC_CS_HIGH) { + BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1); setup |= WBSD_DAT3_H; host->flags |= WBSD_FIGNORE_DETECT; } else { setup &= ~WBSD_DAT3_H; - host->flags &= ~WBSD_FIGNORE_DETECT; + + /* + * We cannot resume card detection immediatly + * because of capacitance and delays in the chip. + */ + mod_timer(&host->ignore_timer, jiffies + HZ/100); } wbsd_write_index(host, WBSD_IDX_SETUP, setup); - + + /* + * Store bus width for later. Will be used when + * setting up the data transfer. + */ + host->bus_width = ios->bus_width; + + spin_unlock_bh(&host->lock); +} + +static int wbsd_get_ro(struct mmc_host* mmc) +{ + struct wbsd_host* host = mmc_priv(mmc); + u8 csr; + + spin_lock_bh(&host->lock); + + csr = inb(host->base + WBSD_CSR); + csr |= WBSD_MSLED; + outb(csr, host->base + WBSD_CSR); + + mdelay(1); + + csr = inb(host->base + WBSD_CSR); + csr &= ~WBSD_MSLED; + outb(csr, host->base + WBSD_CSR); + spin_unlock_bh(&host->lock); + + return csr & WBSD_WRPT; } static struct mmc_host_ops wbsd_ops = { .request = wbsd_request, .set_ios = wbsd_set_ios, + .get_ro = wbsd_get_ro, }; /*****************************************************************************\ @@ -1036,17 +1087,28 @@ static struct mmc_host_ops wbsd_ops = { \*****************************************************************************/ /* - * Helper function for card detection + * Helper function to reset detection ignore */ -static void wbsd_detect_card(unsigned long data) + +static void wbsd_reset_ignore(unsigned long data) { struct wbsd_host *host = (struct wbsd_host*)data; - + BUG_ON(host == NULL); - - DBG("Executing card detection\n"); - - mmc_detect_change(host->mmc); + + DBG("Resetting card detection ignore\n"); + + spin_lock_bh(&host->lock); + + host->flags &= ~WBSD_FIGNORE_DETECT; + + /* + * Card status might have changed during the + * blackout. + */ + tasklet_schedule(&host->card_tasklet); + + spin_unlock_bh(&host->lock); } /* @@ -1066,7 +1128,7 @@ static inline struct mmc_data* wbsd_get_data(struct wbsd_host* host) WARN_ON(!host->mrq->cmd->data); if (!host->mrq->cmd->data) return NULL; - + return host->mrq->cmd->data; } @@ -1074,68 +1136,67 @@ static void wbsd_tasklet_card(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; u8 csr; - + int delay = -1; + spin_lock(&host->lock); - + if (host->flags & WBSD_FIGNORE_DETECT) { spin_unlock(&host->lock); return; } - + csr = inb(host->base + WBSD_CSR); WARN_ON(csr == 0xff); - + if (csr & WBSD_CARDPRESENT) { if (!(host->flags & WBSD_FCARD_PRESENT)) { DBG("Card inserted\n"); host->flags |= WBSD_FCARD_PRESENT; - - /* - * Delay card detection to allow electrical connections - * to stabilise. - */ - mod_timer(&host->timer, jiffies + HZ/2); + + delay = 500; } - - spin_unlock(&host->lock); } else if (host->flags & WBSD_FCARD_PRESENT) { DBG("Card removed\n"); host->flags &= ~WBSD_FCARD_PRESENT; - + if (host->mrq) { printk(KERN_ERR DRIVER_NAME ": Card removed during transfer!\n"); wbsd_reset(host); - + host->mrq->cmd->error = MMC_ERR_FAILED; tasklet_schedule(&host->finish_tasklet); } - - /* - * Unlock first since we might get a call back. - */ - spin_unlock(&host->lock); - mmc_detect_change(host->mmc); + delay = 0; } + + /* + * Unlock first since we might get a call back. + */ + + spin_unlock(&host->lock); + + if (delay != -1) + mmc_detect_change(host->mmc, msecs_to_jiffies(delay)); } static void wbsd_tasklet_fifo(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; struct mmc_data* data; - + spin_lock(&host->lock); - + if (!host->mrq) goto end; - + data = wbsd_get_data(host); if (!data) goto end; @@ -1154,7 +1215,7 @@ static void wbsd_tasklet_fifo(unsigned long param) tasklet_schedule(&host->finish_tasklet); } -end: +end: spin_unlock(&host->lock); } @@ -1162,23 +1223,23 @@ static void wbsd_tasklet_crc(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; struct mmc_data* data; - + spin_lock(&host->lock); - + if (!host->mrq) goto end; - + data = wbsd_get_data(host); if (!data) goto end; - + DBGF("CRC error\n"); data->error = MMC_ERR_BADCRC; - + tasklet_schedule(&host->finish_tasklet); -end: +end: spin_unlock(&host->lock); } @@ -1186,23 +1247,23 @@ static void wbsd_tasklet_timeout(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; struct mmc_data* data; - + spin_lock(&host->lock); - + if (!host->mrq) goto end; - + data = wbsd_get_data(host); if (!data) goto end; - + DBGF("Timeout\n"); data->error = MMC_ERR_TIMEOUT; - + tasklet_schedule(&host->finish_tasklet); -end: +end: spin_unlock(&host->lock); } @@ -1210,20 +1271,20 @@ static void wbsd_tasklet_finish(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; struct mmc_data* data; - + spin_lock(&host->lock); - + WARN_ON(!host->mrq); if (!host->mrq) goto end; - + data = wbsd_get_data(host); if (!data) goto end; wbsd_finish_data(host, data); - -end: + +end: spin_unlock(&host->lock); } @@ -1231,7 +1292,7 @@ static void wbsd_tasklet_block(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; struct mmc_data* data; - + spin_lock(&host->lock); if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) != @@ -1240,15 +1301,15 @@ static void wbsd_tasklet_block(unsigned long param) data = wbsd_get_data(host); if (!data) goto end; - + DBGF("CRC error\n"); data->error = MMC_ERR_BADCRC; - + tasklet_schedule(&host->finish_tasklet); } -end: +end: spin_unlock(&host->lock); } @@ -1260,7 +1321,7 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs) { struct wbsd_host* host = dev_id; int isr; - + isr = inb(host->base + WBSD_ISR); /* @@ -1268,7 +1329,7 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs) */ if (isr == 0xff || isr == 0x00) return IRQ_NONE; - + host->isr |= isr; /* @@ -1286,7 +1347,7 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs) tasklet_hi_schedule(&host->block_tasklet); if (isr & WBSD_INT_TC) tasklet_schedule(&host->finish_tasklet); - + return IRQ_HANDLED; } @@ -1304,14 +1365,14 @@ static int __devinit wbsd_alloc_mmc(struct device* dev) { struct mmc_host* mmc; struct wbsd_host* host; - + /* * Allocate MMC structure. */ mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev); if (!mmc) return -ENOMEM; - + host = mmc_priv(mmc); host->mmc = mmc; @@ -1324,37 +1385,38 @@ static int __devinit wbsd_alloc_mmc(struct device* dev) mmc->f_min = 375000; mmc->f_max = 24000000; mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34; - + mmc->caps = MMC_CAP_4_BIT_DATA; + spin_lock_init(&host->lock); - + /* - * Set up detection timer + * Set up timers */ - init_timer(&host->timer); - host->timer.data = (unsigned long)host; - host->timer.function = wbsd_detect_card; - + init_timer(&host->ignore_timer); + host->ignore_timer.data = (unsigned long)host; + host->ignore_timer.function = wbsd_reset_ignore; + /* * Maximum number of segments. Worst case is one sector per segment * so this will be 64kB/512. */ mmc->max_hw_segs = 128; mmc->max_phys_segs = 128; - + /* * Maximum number of sectors in one transfer. Also limited by 64kB * buffer. */ mmc->max_sectors = 128; - + /* * Maximum segment size. Could be one segment with the maximum number * of segments. */ mmc->max_seg_size = mmc->max_sectors * 512; - + dev_set_drvdata(dev, mmc); - + return 0; } @@ -1362,18 +1424,18 @@ static void __devexit wbsd_free_mmc(struct device* dev) { struct mmc_host* mmc; struct wbsd_host* host; - + mmc = dev_get_drvdata(dev); if (!mmc) return; - + host = mmc_priv(mmc); BUG_ON(host == NULL); - - del_timer_sync(&host->timer); - + + del_timer_sync(&host->ignore_timer); + mmc_free_host(mmc); - + dev_set_drvdata(dev, NULL); } @@ -1385,7 +1447,7 @@ static int __devinit wbsd_scan(struct wbsd_host* host) { int i, j, k; int id; - + /* * Iterate through all ports, all codes to * find hardware that is in our known list. @@ -1394,32 +1456,32 @@ static int __devinit wbsd_scan(struct wbsd_host* host) { if (!request_region(config_ports[i], 2, DRIVER_NAME)) continue; - + for (j = 0;j < sizeof(unlock_codes)/sizeof(int);j++) { id = 0xFFFF; - + outb(unlock_codes[j], config_ports[i]); outb(unlock_codes[j], config_ports[i]); - + outb(WBSD_CONF_ID_HI, config_ports[i]); id = inb(config_ports[i] + 1) << 8; outb(WBSD_CONF_ID_LO, config_ports[i]); id |= inb(config_ports[i] + 1); - + for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++) { if (id == valid_ids[k]) - { + { host->chip_id = id; host->config = config_ports[i]; host->unlock_code = unlock_codes[i]; - + return 0; } } - + if (id != 0xFFFF) { DBG("Unknown hardware (id %x) found at %x\n", @@ -1428,10 +1490,10 @@ static int __devinit wbsd_scan(struct wbsd_host* host) outb(LOCK_CODE, config_ports[i]); } - + release_region(config_ports[i], 2); } - + return -ENODEV; } @@ -1443,12 +1505,12 @@ static int __devinit wbsd_request_region(struct wbsd_host* host, int base) { if (io & 0x7) return -EINVAL; - + if (!request_region(base, 8, DRIVER_NAME)) return -EIO; - + host->base = io; - + return 0; } @@ -1456,12 +1518,12 @@ static void __devexit wbsd_release_regions(struct wbsd_host* host) { if (host->base) release_region(host->base, 8); - + host->base = 0; if (host->config) release_region(host->config, 2); - + host->config = 0; } @@ -1473,10 +1535,10 @@ static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma) { if (dma < 0) return; - + if (request_dma(dma, DRIVER_NAME)) goto err; - + /* * We need to allocate a special buffer in * order for ISA to be able to DMA to it. @@ -1491,7 +1553,7 @@ static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma) */ host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer, WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); - + /* * ISA DMA must be aligned on a 64k basis. */ @@ -1504,19 +1566,19 @@ static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma) goto kfree; host->dma = dma; - + return; - + kfree: /* * If we've gotten here then there is some kind of alignment bug */ BUG_ON(1); - + dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); host->dma_addr = (dma_addr_t)NULL; - + kfree(host->dma_buffer); host->dma_buffer = NULL; @@ -1537,7 +1599,7 @@ static void __devexit wbsd_release_dma(struct wbsd_host* host) kfree(host->dma_buffer); if (host->dma >= 0) free_dma(host->dma); - + host->dma = -1; host->dma_buffer = NULL; host->dma_addr = (dma_addr_t)NULL; @@ -1550,7 +1612,7 @@ static void __devexit wbsd_release_dma(struct wbsd_host* host) static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq) { int ret; - + /* * Allocate interrupt. */ @@ -1558,7 +1620,7 @@ static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq) ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host); if (ret) return ret; - + host->irq = irq; /* @@ -1570,7 +1632,7 @@ static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq) tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host); tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host); tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host); - + return 0; } @@ -1580,9 +1642,9 @@ static void __devexit wbsd_release_irq(struct wbsd_host* host) return; free_irq(host->irq, host); - + host->irq = 0; - + tasklet_kill(&host->card_tasklet); tasklet_kill(&host->fifo_tasklet); tasklet_kill(&host->crc_tasklet); @@ -1599,7 +1661,7 @@ static int __devinit wbsd_request_resources(struct wbsd_host* host, int base, int irq, int dma) { int ret; - + /* * Allocate I/O ports. */ @@ -1618,7 +1680,7 @@ static int __devinit wbsd_request_resources(struct wbsd_host* host, * Allocate DMA. */ wbsd_request_dma(host, dma); - + return 0; } @@ -1641,7 +1703,7 @@ static void __devinit wbsd_chip_config(struct wbsd_host* host) { /* * Reset the chip. - */ + */ wbsd_write_config(host, WBSD_CONF_SWRST, 1); wbsd_write_config(host, WBSD_CONF_SWRST, 0); @@ -1649,23 +1711,23 @@ static void __devinit wbsd_chip_config(struct wbsd_host* host) * Select SD/MMC function. */ wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); - + /* * Set up card detection. */ wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11); - + /* * Configure chip */ wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8); wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff); - + wbsd_write_config(host, WBSD_CONF_IRQ, host->irq); - + if (host->dma >= 0) wbsd_write_config(host, WBSD_CONF_DRQ, host->dma); - + /* * Enable and power up chip. */ @@ -1676,26 +1738,26 @@ static void __devinit wbsd_chip_config(struct wbsd_host* host) /* * Check that configured resources are correct. */ - + static int __devinit wbsd_chip_validate(struct wbsd_host* host) { int base, irq, dma; - + /* * Select SD/MMC function. */ wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); - + /* * Read configuration. */ base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8; base |= wbsd_read_config(host, WBSD_CONF_PORT_LO); - + irq = wbsd_read_config(host, WBSD_CONF_IRQ); - + dma = wbsd_read_config(host, WBSD_CONF_DRQ); - + /* * Validate against given configuration. */ @@ -1705,7 +1767,7 @@ static int __devinit wbsd_chip_validate(struct wbsd_host* host) return 0; if ((dma != host->dma) && (host->dma != -1)) return 0; - + return 1; } @@ -1721,14 +1783,14 @@ static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, struct wbsd_host* host = NULL; struct mmc_host* mmc = NULL; int ret; - + ret = wbsd_alloc_mmc(dev); if (ret) return ret; - + mmc = dev_get_drvdata(dev); host = mmc_priv(mmc); - + /* * Scan for hardware. */ @@ -1747,7 +1809,7 @@ static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, return ret; } } - + /* * Request resources. */ @@ -1758,7 +1820,7 @@ static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, wbsd_free_mmc(dev); return ret; } - + /* * See if chip needs to be configured. */ @@ -1775,7 +1837,7 @@ static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, } else wbsd_chip_config(host); - + /* * Power Management stuff. No idea how this works. * Not tested. @@ -1793,7 +1855,7 @@ static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, * Reset the chip into a known state. */ wbsd_init_device(host); - + mmc_add_host(mmc); printk(KERN_INFO "%s: W83L51xD", mmc_hostname(mmc)); @@ -1815,12 +1877,12 @@ static void __devexit wbsd_shutdown(struct device* dev, int pnp) { struct mmc_host* mmc = dev_get_drvdata(dev); struct wbsd_host* host; - + if (!mmc) return; host = mmc_priv(mmc); - + mmc_remove_host(mmc); if (!pnp) @@ -1833,9 +1895,9 @@ static void __devexit wbsd_shutdown(struct device* dev, int pnp) wbsd_write_config(host, WBSD_CONF_ENABLE, 0); wbsd_lock_config(host); } - + wbsd_release_resources(host); - + wbsd_free_mmc(dev); } @@ -1865,7 +1927,7 @@ static int __devinit wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id) { int io, irq, dma; - + /* * Get resources from PnP layer. */ @@ -1875,9 +1937,9 @@ wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id) dma = pnp_dma(pnpdev, 0); else dma = -1; - + DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma); - + return wbsd_init(&pnpdev->dev, io, irq, dma, 1); } @@ -1918,7 +1980,7 @@ static struct device_driver wbsd_driver = { .bus = &platform_bus_type, .probe = wbsd_probe, .remove = wbsd_remove, - + .suspend = wbsd_suspend, .resume = wbsd_resume, }; @@ -1941,7 +2003,7 @@ static struct pnp_driver wbsd_pnp_driver = { static int __init wbsd_drv_init(void) { int result; - + printk(KERN_INFO DRIVER_NAME ": Winbond W83L51xD SD/MMC card interface driver, " DRIVER_VERSION "\n"); @@ -1956,8 +2018,8 @@ static int __init wbsd_drv_init(void) return result; } -#endif /* CONFIG_PNP */ - +#endif /* CONFIG_PNP */ + if (nopnp) { result = driver_register(&wbsd_driver); @@ -1979,13 +2041,13 @@ static void __exit wbsd_drv_exit(void) if (!nopnp) pnp_unregister_driver(&wbsd_pnp_driver); - -#endif /* CONFIG_PNP */ + +#endif /* CONFIG_PNP */ if (nopnp) { platform_device_unregister(wbsd_device); - + driver_unregister(&wbsd_driver); } |