diff options
Diffstat (limited to 'drivers/scsi/mac_esp.c')
-rw-r--r-- | drivers/scsi/mac_esp.c | 173 |
1 files changed, 6 insertions, 167 deletions
diff --git a/drivers/scsi/mac_esp.c b/drivers/scsi/mac_esp.c index c92b6c1e02ee..764d320bb2ca 100644 --- a/drivers/scsi/mac_esp.c +++ b/drivers/scsi/mac_esp.c @@ -52,7 +52,6 @@ struct mac_esp_priv { struct esp *esp; void __iomem *pdma_regs; void __iomem *pdma_io; - int error; }; static struct esp *esp_chips[2]; static DEFINE_SPINLOCK(esp_chips_lock); @@ -87,12 +86,11 @@ static void mac_esp_dma_invalidate(struct esp *esp) static int mac_esp_dma_error(struct esp *esp) { - return MAC_ESP_GET_PRIV(esp)->error; + return esp->send_cmd_error; } static inline int mac_esp_wait_for_empty_fifo(struct esp *esp) { - struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); int i = 500000; do { @@ -107,7 +105,7 @@ static inline int mac_esp_wait_for_empty_fifo(struct esp *esp) printk(KERN_ERR PFX "FIFO is not empty (sreg %02x)\n", esp_read8(ESP_STATUS)); - mep->error = 1; + esp->send_cmd_error = 1; return 1; } @@ -133,7 +131,7 @@ static inline int mac_esp_wait_for_dreq(struct esp *esp) printk(KERN_ERR PFX "PDMA timeout (sreg %02x)\n", esp_read8(ESP_STATUS)); - mep->error = 1; + esp->send_cmd_error = 1; return 1; } @@ -200,7 +198,7 @@ static void mac_esp_send_pdma_cmd(struct esp *esp, u32 addr, u32 esp_count, { struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); - mep->error = 0; + esp->send_cmd_error = 0; if (!write) scsi_esp_cmd(esp, ESP_CMD_FLUSH); @@ -238,166 +236,6 @@ static void mac_esp_send_pdma_cmd(struct esp *esp, u32 addr, u32 esp_count, } while (esp_count); } -/* - * Programmed IO routines follow. - */ - -static inline unsigned int mac_esp_wait_for_fifo(struct esp *esp) -{ - int i = 500000; - - do { - unsigned int fbytes = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; - - if (fbytes) - return fbytes; - - udelay(2); - } while (--i); - - printk(KERN_ERR PFX "FIFO is empty (sreg %02x)\n", - esp_read8(ESP_STATUS)); - return 0; -} - -static inline int mac_esp_wait_for_intr(struct esp *esp) -{ - struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); - int i = 500000; - - do { - esp->sreg = esp_read8(ESP_STATUS); - if (esp->sreg & ESP_STAT_INTR) - return 0; - - udelay(2); - } while (--i); - - printk(KERN_ERR PFX "IRQ timeout (sreg %02x)\n", esp->sreg); - mep->error = 1; - return 1; -} - -#define MAC_ESP_PIO_LOOP(operands, reg1) \ - asm volatile ( \ - "1: moveb " operands " \n" \ - " subqw #1,%1 \n" \ - " jbne 1b \n" \ - : "+a" (addr), "+r" (reg1) \ - : "a" (fifo)) - -#define MAC_ESP_PIO_FILL(operands, reg1) \ - asm volatile ( \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " moveb " operands " \n" \ - " subqw #8,%1 \n" \ - " subqw #8,%1 \n" \ - : "+a" (addr), "+r" (reg1) \ - : "a" (fifo)) - -#define MAC_ESP_FIFO_SIZE 16 - -static void mac_esp_send_pio_cmd(struct esp *esp, u32 addr, u32 esp_count, - u32 dma_count, int write, u8 cmd) -{ - struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); - u8 __iomem *fifo = esp->regs + ESP_FDATA * 16; - u8 phase = esp->sreg & ESP_STAT_PMASK; - - cmd &= ~ESP_CMD_DMA; - mep->error = 0; - - if (write) { - u8 *dst = (u8 *)addr; - u8 mask = ~(phase == ESP_MIP ? ESP_INTR_FDONE : ESP_INTR_BSERV); - - scsi_esp_cmd(esp, cmd); - - while (1) { - if (!mac_esp_wait_for_fifo(esp)) - break; - - *dst++ = esp_read8(ESP_FDATA); - --esp_count; - - if (!esp_count) - break; - - if (mac_esp_wait_for_intr(esp)) - break; - - if ((esp->sreg & ESP_STAT_PMASK) != phase) - break; - - esp->ireg = esp_read8(ESP_INTRPT); - if (esp->ireg & mask) { - mep->error = 1; - break; - } - - if (phase == ESP_MIP) - scsi_esp_cmd(esp, ESP_CMD_MOK); - - scsi_esp_cmd(esp, ESP_CMD_TI); - } - } else { - scsi_esp_cmd(esp, ESP_CMD_FLUSH); - - if (esp_count >= MAC_ESP_FIFO_SIZE) - MAC_ESP_PIO_FILL("%0@+,%2@", esp_count); - else - MAC_ESP_PIO_LOOP("%0@+,%2@", esp_count); - - scsi_esp_cmd(esp, cmd); - - while (esp_count) { - unsigned int n; - - if (mac_esp_wait_for_intr(esp)) - break; - - if ((esp->sreg & ESP_STAT_PMASK) != phase) - break; - - esp->ireg = esp_read8(ESP_INTRPT); - if (esp->ireg & ~ESP_INTR_BSERV) { - mep->error = 1; - break; - } - - n = MAC_ESP_FIFO_SIZE - - (esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES); - if (n > esp_count) - n = esp_count; - - if (n == MAC_ESP_FIFO_SIZE) { - MAC_ESP_PIO_FILL("%0@+,%2@", esp_count); - } else { - esp_count -= n; - MAC_ESP_PIO_LOOP("%0@+,%2@", n); - } - - scsi_esp_cmd(esp, ESP_CMD_TI); - } - } - - esp->send_cmd_residual = esp_count; -} - static int mac_esp_irq_pending(struct esp *esp) { if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) @@ -516,6 +354,7 @@ static int esp_mac_probe(struct platform_device *dev) mep->pdma_regs = NULL; break; } + esp->fifo_reg = esp->regs + ESP_FDATA * 16; esp->ops = &mac_esp_ops; esp->flags = ESP_FLAG_NO_DMA_MAP; @@ -524,7 +363,7 @@ static int esp_mac_probe(struct platform_device *dev) esp_write8(0, ESP_TCLOW); esp_write8(0, ESP_TCMED); esp->flags |= ESP_FLAG_DISABLE_SYNC; - mac_esp_ops.send_dma_cmd = mac_esp_send_pio_cmd; + mac_esp_ops.send_dma_cmd = esp_send_pio_cmd; } else { printk(KERN_INFO PFX "using PDMA for controller %d\n", dev->id); } |