Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/types.h> |
| 2 | #include <linux/mm.h> |
| 3 | #include <linux/blkdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/interrupt.h> |
| 5 | |
| 6 | #include <asm/page.h> |
| 7 | #include <asm/pgtable.h> |
| 8 | #include <asm/mvme147hw.h> |
| 9 | #include <asm/irq.h> |
| 10 | |
| 11 | #include "scsi.h" |
| 12 | #include <scsi/scsi_host.h> |
| 13 | #include "wd33c93.h" |
| 14 | #include "mvme147.h" |
| 15 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 16 | #include <linux/stat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | static struct Scsi_Host *mvme147_host = NULL; |
| 20 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 21 | static irqreturn_t mvme147_intr(int irq, void *dummy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | { |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 23 | if (irq == MVME147_IRQ_SCSI_PORT) |
| 24 | wd33c93_intr(mvme147_host); |
| 25 | else |
| 26 | m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ |
| 27 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | } |
| 29 | |
Henrik Kretzschmar | 6539641 | 2006-09-12 23:49:33 +0200 | [diff] [blame] | 30 | static int dma_setup(struct scsi_cmnd *cmd, int dir_in) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | { |
Geert Uytterhoeven | ce19566 | 2010-04-04 11:00:38 +0200 | [diff] [blame^] | 32 | struct WD33C93_hostdata *hdata = shost_priv(mvme147_host); |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 33 | unsigned char flags = 0x01; |
| 34 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 36 | /* setup dma direction */ |
| 37 | if (!dir_in) |
| 38 | flags |= 0x04; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 40 | /* remember direction */ |
Geert Uytterhoeven | ce19566 | 2010-04-04 11:00:38 +0200 | [diff] [blame^] | 41 | hdata->dma_dir = dir_in; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 43 | if (dir_in) { |
| 44 | /* invalidate any cache */ |
| 45 | cache_clear(addr, cmd->SCp.this_residual); |
| 46 | } else { |
| 47 | /* push any dirty cache */ |
| 48 | cache_push(addr, cmd->SCp.this_residual); |
| 49 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 51 | /* start DMA */ |
| 52 | m147_pcc->dma_bcr = cmd->SCp.this_residual | (1 << 24); |
| 53 | m147_pcc->dma_dadr = addr; |
| 54 | m147_pcc->dma_cntrl = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 56 | /* return success */ |
| 57 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | |
Henrik Kretzschmar | 6539641 | 2006-09-12 23:49:33 +0200 | [diff] [blame] | 60 | static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 61 | int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 63 | m147_pcc->dma_cntrl = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
| 65 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 66 | int mvme147_detect(struct scsi_host_template *tpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 68 | static unsigned char called = 0; |
| 69 | wd33c93_regs regs; |
Geert Uytterhoeven | ce19566 | 2010-04-04 11:00:38 +0200 | [diff] [blame^] | 70 | struct WD33C93_hostdata *hdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 72 | if (!MACH_IS_MVME147 || called) |
| 73 | return 0; |
| 74 | called++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 76 | tpnt->proc_name = "MVME147"; |
| 77 | tpnt->proc_info = &wd33c93_proc_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 79 | mvme147_host = scsi_register(tpnt, sizeof(struct WD33C93_hostdata)); |
| 80 | if (!mvme147_host) |
| 81 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 83 | mvme147_host->base = 0xfffe4000; |
| 84 | mvme147_host->irq = MVME147_IRQ_SCSI_PORT; |
| 85 | regs.SASR = (volatile unsigned char *)0xfffe4000; |
| 86 | regs.SCMD = (volatile unsigned char *)0xfffe4001; |
Geert Uytterhoeven | ce19566 | 2010-04-04 11:00:38 +0200 | [diff] [blame^] | 87 | hdata = shost_priv(mvme147_host); |
| 88 | hdata->no_sync = 0xff; |
| 89 | hdata->fast = 0; |
| 90 | hdata->dma_mode = CTRL_DMA; |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 91 | wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 93 | if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, |
| 94 | "MVME147 SCSI PORT", mvme147_intr)) |
| 95 | goto err_unregister; |
| 96 | if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, |
| 97 | "MVME147 SCSI DMA", mvme147_intr)) |
| 98 | goto err_free_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #if 0 /* Disabled; causes problems booting */ |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 100 | m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */ |
| 101 | udelay(100); |
| 102 | m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */ |
| 103 | udelay(2000); |
| 104 | m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | #endif |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 106 | m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 108 | m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */ |
| 109 | m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 111 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 113 | err_free_irq: |
| 114 | free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); |
| 115 | err_unregister: |
| 116 | scsi_unregister(mvme147_host); |
| 117 | err_out: |
| 118 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
Henrik Kretzschmar | 6539641 | 2006-09-12 23:49:33 +0200 | [diff] [blame] | 121 | static int mvme147_bus_reset(struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
| 123 | /* FIXME perform bus-specific reset */ |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 124 | |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 125 | /* FIXME 2: kill this function, and let midlayer fallback to |
Jeff Garzik | df0ae24 | 2005-05-28 07:57:14 -0400 | [diff] [blame] | 126 | the same result, calling wd33c93_host_reset() */ |
| 127 | |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 128 | spin_lock_irq(cmd->device->host->host_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | wd33c93_host_reset(cmd); |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 130 | spin_unlock_irq(cmd->device->host->host_lock); |
| 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | return SUCCESS; |
| 133 | } |
| 134 | |
| 135 | #define HOSTS_C |
| 136 | |
| 137 | #include "mvme147.h" |
| 138 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 139 | static struct scsi_host_template driver_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | .proc_name = "MVME147", |
| 141 | .name = "MVME147 built-in SCSI", |
| 142 | .detect = mvme147_detect, |
| 143 | .release = mvme147_release, |
| 144 | .queuecommand = wd33c93_queuecommand, |
| 145 | .eh_abort_handler = wd33c93_abort, |
| 146 | .eh_bus_reset_handler = mvme147_bus_reset, |
| 147 | .eh_host_reset_handler = wd33c93_host_reset, |
| 148 | .can_queue = CAN_QUEUE, |
| 149 | .this_id = 7, |
| 150 | .sg_tablesize = SG_ALL, |
| 151 | .cmd_per_lun = CMD_PER_LUN, |
| 152 | .use_clustering = ENABLE_CLUSTERING |
| 153 | }; |
| 154 | |
| 155 | |
| 156 | #include "scsi_module.c" |
| 157 | |
| 158 | int mvme147_release(struct Scsi_Host *instance) |
| 159 | { |
| 160 | #ifdef MODULE |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 161 | /* XXX Make sure DMA is stopped! */ |
| 162 | free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); |
| 163 | free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | #endif |
Geert Uytterhoeven | be4540d | 2010-04-04 11:00:34 +0200 | [diff] [blame] | 165 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | } |