diff options
Diffstat (limited to 'common/cmd_ide.c')
| -rw-r--r-- | common/cmd_ide.c | 1563 |
1 files changed, 1563 insertions, 0 deletions
diff --git a/common/cmd_ide.c b/common/cmd_ide.c new file mode 100644 index 0000000000..9cbfe1bb04 --- /dev/null +++ b/common/cmd_ide.c @@ -0,0 +1,1563 @@ +/* + * (C) Copyright 2000-2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + +/* + * IDE support + */ +#include <common.h> +#include <config.h> +#include <watchdog.h> +#include <command.h> +#include <image.h> +#include <asm/byteorder.h> +#if defined(CONFIG_IDE_8xx_DIRECT) || defined(CONFIG_IDE_PCMCIA) +# include <pcmcia.h> +#endif +#ifdef CONFIG_8xx +# include <mpc8xx.h> +#endif +#include <ide.h> +#include <ata.h> +#include <cmd_ide.h> +#include <cmd_disk.h> +#ifdef CONFIG_STATUS_LED +# include <status_led.h> +#endif + +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include <status_led.h> +# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) +#else +# define SHOW_BOOT_PROGRESS(arg) +#endif + + +#undef IDE_DEBUG + +#ifdef IDE_DEBUG +#define PRINTF(fmt,args...) printf (fmt ,##args) +#else +#define PRINTF(fmt,args...) +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_IDE) + +/* Timings for IDE Interface + * + * SETUP / LENGTH / HOLD - cycles valid for 50 MHz clk + * 70 165 30 PIO-Mode 0, [ns] + * 4 9 2 [Cycles] + * 50 125 20 PIO-Mode 1, [ns] + * 3 7 2 [Cycles] + * 30 100 15 PIO-Mode 2, [ns] + * 2 6 1 [Cycles] + * 30 80 10 PIO-Mode 3, [ns] + * 2 5 1 [Cycles] + * 25 70 10 PIO-Mode 4, [ns] + * 2 4 1 [Cycles] + */ + +const static pio_config_t pio_config_ns [IDE_MAX_PIO_MODE+1] = +{ + /* Setup Length Hold */ + { 70, 165, 30 }, /* PIO-Mode 0, [ns] */ + { 50, 125, 20 }, /* PIO-Mode 1, [ns] */ + { 30, 101, 15 }, /* PIO-Mode 2, [ns] */ + { 30, 80, 10 }, /* PIO-Mode 3, [ns] */ + { 25, 70, 10 }, /* PIO-Mode 4, [ns] */ +}; + +static pio_config_t pio_config_clk [IDE_MAX_PIO_MODE+1]; + +#ifndef CFG_PIO_MODE +#define CFG_PIO_MODE 0 /* use a relaxed default */ +#endif +static int pio_mode = CFG_PIO_MODE; + +/* Make clock cycles and always round up */ + +#define PCMCIA_MK_CLKS( t, T ) (( (t) * (T) + 999U ) / 1000U ) + +/* ------------------------------------------------------------------------- */ + +/* Current I/O Device */ +static int curr_device = -1; + +/* Current offset for IDE0 / IDE1 bus access */ +ulong ide_bus_offset[CFG_IDE_MAXBUS] = { +#if defined(CFG_ATA_IDE0_OFFSET) + CFG_ATA_IDE0_OFFSET, +#endif +#if defined(CFG_ATA_IDE1_OFFSET) && (CFG_IDE_MAXBUS > 1) + CFG_ATA_IDE1_OFFSET, +#endif +}; + +#define ATA_CURR_BASE(dev) (CFG_ATA_BASE_ADDR+ide_bus_offset[IDE_BUS(dev)]) + +static int ide_bus_ok[CFG_IDE_MAXBUS]; + +static block_dev_desc_t ide_dev_desc[CFG_IDE_MAXDEVICE]; +/* ------------------------------------------------------------------------- */ + +#ifdef CONFIG_IDE_LED +static void ide_led (uchar led, uchar status); +#else +#define ide_led(a,b) /* dummy */ +#endif + +#ifdef CONFIG_IDE_RESET +static void ide_reset (void); +#else +#define ide_reset() /* dummy */ +#endif + +static void ide_ident (block_dev_desc_t *dev_desc); +static uchar ide_wait (int dev, ulong t); + +#define IDE_TIME_OUT 2000 /* 2 sec timeout */ + +#define ATAPI_TIME_OUT 7000 /* 7 sec timeout (5 sec seems to work...) */ + +#define IDE_SPIN_UP_TIME_OUT 5000 /* 5 sec spin-up timeout */ + +static void __inline__ outb(int dev, int port, unsigned char val); +static unsigned char __inline__ inb(int dev, int port); +static void input_swap_data(int dev, ulong *sect_buf, int words); +static void input_data(int dev, ulong *sect_buf, int words); +static void output_data(int dev, ulong *sect_buf, int words); +static void ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len); + + +#ifdef CONFIG_ATAPI +static void atapi_inquiry(block_dev_desc_t *dev_desc); +ulong atapi_read (int device, ulong blknr, ulong blkcnt, ulong *buffer); +#endif + + +#ifdef CONFIG_IDE_8xx_DIRECT +static void set_pcmcia_timing (int pmode); +#else +#define set_pcmcia_timing(a) /* dummy */ +#endif + +/* ------------------------------------------------------------------------- */ + +int do_ide (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + int rcode = 0; + + switch (argc) { + case 0: + case 1: + printf ("Usage:\n%s\n", cmdtp->usage); + return 1; + case 2: + if (strncmp(argv[1],"res",3) == 0) { + puts ("\nReset IDE" +#ifdef CONFIG_IDE_8xx_DIRECT + " on PCMCIA " PCMCIA_SLOT_MSG +#endif + ": "); + + ide_init (); + return 0; + } else if (strncmp(argv[1],"inf",3) == 0) { + int i; + + putc ('\n'); + + for (i=0; i<CFG_IDE_MAXDEVICE; ++i) { + if (ide_dev_desc[i].type==DEV_TYPE_UNKNOWN) + continue; /* list only known devices */ + printf ("IDE device %d: ", i); + dev_print(&ide_dev_desc[i]); + } + return 0; + + } else if (strncmp(argv[1],"dev",3) == 0) { + if ((curr_device < 0) || (curr_device >= CFG_IDE_MAXDEVICE)) { + puts ("\nno IDE devices available\n"); + return 1; + } + printf ("\nIDE device %d: ", curr_device); + dev_print(&ide_dev_desc[curr_device]); + return 0; + } else if (strncmp(argv[1],"part",4) == 0) { + int dev, ok; + + for (ok=0, dev=0; dev<CFG_IDE_MAXDEVICE; ++dev) { + if (ide_dev_desc[dev].part_type!=PART_TYPE_UNKNOWN) { + ++ok; + if (dev) + putc ('\n'); + print_part(&ide_dev_desc[dev]); + } + } + if (!ok) { + puts ("\nno IDE devices available\n"); + rcode ++; + } + return rcode; + } + printf ("Usage:\n%s\n", cmdtp->usage); + return 1; + case 3: + if (strncmp(argv[1],"dev",3) == 0) { + int dev = (int)simple_strtoul(argv[2], NULL, 10); + + printf ("\nIDE device %d: ", dev); + if (dev >= CFG_IDE_MAXDEVICE) { + puts ("unknown device\n"); + return 1; + } + dev_print(&ide_dev_desc[dev]); + /*ide_print (dev);*/ + + if (ide_dev_desc[dev].type == DEV_TYPE_UNKNOWN) { + return 1; + } + + curr_device = dev; + + puts ("... is now current device\n"); + + return 0; + } else if (strncmp(argv[1],"part",4) == 0) { + int dev = (int)simple_strtoul(argv[2], NULL, 10); + + if (ide_dev_desc[dev].part_type!=PART_TYPE_UNKNOWN) { + print_part(&ide_dev_desc[dev]); + } else { + printf ("\nIDE device %d not available\n", dev); + rcode = 1; + } + return rcode; +#if 0 + } else if (strncmp(argv[1],"pio",4) == 0) { + int mode = (int)simple_strtoul(argv[2], NULL, 10); + + if ((mode >= 0) && (mode <= IDE_MAX_PIO_MODE)) { + puts ("\nSetting "); + pio_mode = mode; + ide_init (); + } else { + printf ("\nInvalid PIO mode %d (0 ... %d only)\n", + mode, IDE_MAX_PIO_MODE); + } + return; +#endif + } + + printf ("Usage:\n%s\n", cmdtp->usage); + return 1; + default: + /* at least 4 args */ + + if (strcmp(argv[1],"read") == 0) { + ulong addr = simple_strtoul(argv[2], NULL, 16); + ulong blk = simple_strtoul(argv[3], NULL, 16); + ulong cnt = simple_strtoul(argv[4], NULL, 16); + ulong n; + + printf ("\nIDE read: device %d block # %ld, count %ld ... ", + curr_device, blk, cnt); + + n = ide_dev_desc[curr_device].block_read (curr_device, + blk, cnt, + (ulong *)addr); + /* flush cache after read */ + flush_cache (addr, cnt*ide_dev_desc[curr_device].blksz); + + printf ("%ld blocks read: %s\n", + n, (n==cnt) ? "OK" : "ERROR"); + if (n==cnt) { + return 0; + } else { + return 1; + } + } else if (strcmp(argv[1],"write") == 0) { + ulong addr = simple_strtoul(argv[2], NULL, 16); + ulong blk = simple_strtoul(argv[3], NULL, 16); + ulong cnt = simple_strtoul(argv[4], NULL, 16); + ulong n; + + printf ("\nIDE write: device %d block # %ld, count %ld ... ", + curr_device, blk, cnt); + + n = ide_write (curr_device, blk, cnt, (ulong *)addr); + + printf ("%ld blocks written: %s\n", + n, (n==cnt) ? "OK" : "ERROR"); + if (n==cnt) { + return 0; + } else { + return 1; + } + } else { + printf ("Usage:\n%s\n", cmdtp->usage); + rcode = 1; + } + + return rcode; + } +} + +int do_diskboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + char *boot_device = NULL; + char *ep; + int dev, part = 0; + ulong cnt; + ulong addr; + disk_partition_t info; + image_header_t *hdr; + int rcode = 0; + + switch (argc) { + case 1: + addr = CFG_LOAD_ADDR; + boot_device = getenv ("bootdevice"); + break; + case 2: + addr = simple_strtoul(argv[1], NULL, 16); + boot_device = getenv ("bootdevice"); + break; + case 3: + addr = simple_strtoul(argv[1], NULL, 16); + boot_device = argv[2]; + break; + default: + printf ("Usage:\n%s\n", cmdtp->usage); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + if (!boot_device) { + puts ("\n** No boot device **\n"); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + dev = simple_strtoul(boot_device, &ep, 16); + + if (ide_dev_desc[dev].type==DEV_TYPE_UNKNOWN) { + printf ("\n** Device %d not available\n", dev); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + if (*ep) { + if (*ep != ':') { + puts ("\n** Invalid boot device, use `dev[:part]' **\n"); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + part = simple_strtoul(++ep, NULL, 16); + } + if (get_partition_info (&ide_dev_desc[dev], part, &info)) { + SHOW_BOOT_PROGRESS (-1); + return 1; + } + if (strncmp(info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) { + printf ("\n** Invalid partition type \"%.32s\"" + " (expect \"" BOOT_PART_TYPE "\")\n", + info.type); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + printf ("\nLoading from IDE device %d, partition %d: " + "Name: %.32s Type: %.32s\n", + dev, part, info.name, info.type); + + PRINTF ("First Block: %ld, # of blocks: %ld, Block Size: %ld\n", + info.start, info.size, info.blksz); + + if (ide_dev_desc[dev].block_read (dev, info.start, 1, (ulong *)addr) != 1) { + printf ("** Read error on %d:%d\n", dev, part); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + hdr = (image_header_t *)addr; + + if (ntohl(hdr->ih_magic) == IH_MAGIC) { + + print_image_hdr (hdr); + + cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t)); + cnt += info.blksz - 1; + cnt /= info.blksz; + cnt -= 1; + } else { + printf("\n** Bad Magic Number **\n"); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + if (ide_dev_desc[dev].block_read (dev, info.start+1, cnt, + (ulong *)(addr+info.blksz)) != cnt) { + printf ("** Read error on %d:%d\n", dev, part); + SHOW_BOOT_PROGRESS (-1); + return 1; + } + + + /* Loading ok, update default load address */ + + load_addr = addr; + + /* Check if we should attempt an auto-start */ + if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { + char *local_args[2]; + extern int do_bootm (cmd_tbl_t *, int, int, char *[]); + + local_args[0] = argv[0]; + local_args[1] = NULL; + + printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); + + do_bootm (cmdtp, 0, 1, local_args); + rcode = 1; + } + return rcode; +} + +/* ------------------------------------------------------------------------- */ + +void ide_init (void) +{ + DECLARE_GLOBAL_DATA_PTR; + +#ifdef CONFIG_IDE_8xx_DIRECT + volatile immap_t *immr = (immap_t *)CFG_IMMR; + volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia); +#endif + unsigned char c; + int i, bus; + +#ifdef CONFIG_IDE_8xx_PCCARD + extern int pcmcia_on (void); + + WATCHDOG_RESET(); + + /* initialize the PCMCIA IDE adapter card */ + if (pcmcia_on()) + return; + udelay (1000000); /* 1 s */ +#endif /* CONFIG_IDE_8xx_PCCARD */ + + WATCHDOG_RESET(); + + /* Initialize PIO timing tables */ + for (i=0; i <= IDE_MAX_PIO_MODE; ++i) { + pio_config_clk[i].t_setup = PCMCIA_MK_CLKS(pio_config_ns[i].t_setup, + gd->bus_clk); + pio_config_clk[i].t_length = PCMCIA_MK_CLKS(pio_config_ns[i].t_length, + gd->bus_clk); + pio_config_clk[i].t_hold = PCMCIA_MK_CLKS(pio_config_ns[i].t_hold, + gd->bus_clk); + PRINTF ("PIO Mode %d: setup=%2d ns/%d clk" + " len=%3d ns/%d clk" + " hold=%2d ns/%d clk\n", + i, + pio_config_ns[i].t_setup, pio_config_clk[i].t_setup, + pio_config_ns[i].t_length, pio_config_clk[i].t_length, + pio_config_ns[i].t_hold, pio_config_clk[i].t_hold); + } + + /* Reset the IDE just to be sure. + * Light LED's to show + */ + ide_led ((LED_IDE1 | LED_IDE2), 1); /* LED's on */ + ide_reset (); /* ATAPI Drives seems to need a proper IDE Reset */ + +#ifdef CONFIG_IDE_8xx_DIRECT + /* PCMCIA / IDE initialization for common mem space */ + pcmp->pcmc_pgcrb = 0; +#endif + + /* start in PIO mode 0 - most relaxed timings */ + pio_mode = 0; + set_pcmcia_timing (pio_mode); + + /* + * Wait for IDE to get ready. + * According to spec, this can take up to 31 seconds! + */ + for (bus=0; bus<CFG_IDE_MAXBUS; ++bus) { + int dev = bus * (CFG_IDE_MAXDEVICE / CFG_IDE_MAXBUS); + + printf ("Bus %d: ", bus); + + ide_bus_ok[bus] = 0; + + /* Select device + */ + udelay (100000); /* 100 ms */ + outb (dev, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(dev)); + udelay (100000); /* 100 ms */ + + i = 0; + do { + udelay (10000); /* 10 ms */ + + c = inb (dev, ATA_STATUS); + i++; + if (i > (ATA_RESET_TIME * 100)) { + puts ("** Timeout **\n"); + ide_led ((LED_IDE1 | LED_IDE2), 0); /* LED's off */ + return; + } + if ((i >= 100) && ((i%100)==0)) { + putc ('.'); + } + } while (c & ATA_STAT_BUSY); + + if (c & (ATA_STAT_BUSY | ATA_STAT_FAULT)) { + puts ("not available "); + PRINTF ("Status = 0x%02X ", c); +#ifndef CONFIG_ATAPI /* ATAPI Devices do not set DRDY */ + } else if ((c & ATA_STAT_READY) == 0) { + puts ("not available "); + PRINTF ("Status = 0x%02X ", c); +#endif + } else { + puts ("OK "); + ide_bus_ok[bus] = 1; + } + WATCHDOG_RESET(); + } + putc ('\n'); + + ide_led ((LED_IDE1 | LED_IDE2), 0); /* LED's off */ + + curr_device = -1; + for (i=0; i<CFG_IDE_MAXDEVICE; ++i) { +#ifdef CONFIG_IDE_LED + int led = (IDE_BUS(i) == 0) ? LED_IDE1 : LED_IDE2; +#endif + ide_dev_desc[i].if_type=IF_TYPE_IDE; + ide_dev_desc[i].dev=i; + ide_dev_desc[i].part_type=PART_TYPE_UNKNOWN; + ide_dev_desc[i].blksz=0; + ide_dev_desc[i].lba=0; + ide_dev_desc[i].block_read=ide_read; + if (!ide_bus_ok[IDE_BUS(i)]) + continue; + ide_led (led, 1); /* LED on */ + ide_ident(&ide_dev_desc[i]); + ide_led (led, 0); /* LED off */ + dev_print(&ide_dev_desc[i]); +/* ide_print (i); */ + if ((ide_dev_desc[i].lba > 0) && (ide_dev_desc[i].blksz > 0)) { + init_part (&ide_dev_desc[i]); /* initialize partition type */ + if (curr_device < 0) + curr_device = i; + } + } + WATCHDOG_RESET(); +} + +/* ------------------------------------------------------------------------- */ + +block_dev_desc_t * ide_get_dev(int dev) +{ + return ((block_dev_desc_t *)&ide_dev_desc[dev]); +} + + +#ifdef CONFIG_IDE_8xx_DIRECT + +static void +set_pcmcia_timing (int pmode) +{ + volatile immap_t *immr = (immap_t *)CFG_IMMR; + volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia); + ulong timings; + + PRINTF ("Set timing for PIO Mode %d\n", pmode); + + timings = PCMCIA_SHT(pio_config_clk[pmode].t_hold) + | PCMCIA_SST(pio_config_clk[pmode].t_setup) + | PCMCIA_SL (pio_config_clk[pmode].t_length) + ; + + /* IDE 0 + */ + pcmp->pcmc_pbr0 = CFG_PCMCIA_PBR0; + pcmp->pcmc_por0 = CFG_PCMCIA_POR0 +#if (CFG_PCMCIA_POR0 != 0) + | timings +#endif + ; + PRINTF ("PBR0: %08x POR0: %08x\n", pcmp->pcmc_pbr0, pcmp->pcmc_por0); + + pcmp->pcmc_pbr1 = CFG_PCMCIA_PBR1; + pcmp->pcmc_por1 = CFG_PCMCIA_POR1 +#if (CFG_PCMCIA_POR1 != 0) + | timings +#endif + ; + PRINTF ("PBR1: %08x POR1: %08x\n", pcmp->pcmc_pbr1, pcmp->pcmc_por1); + + pcmp->pcmc_pbr2 = CFG_PCMCIA_PBR2; + pcmp->pcmc_por2 = CFG_PCMCIA_POR2 +#if (CFG_PCMCIA_POR2 != 0) + | timings +#endif + ; + PRINTF ("PBR2: %08x POR2: %08x\n", pcmp->pcmc_pbr2, pcmp->pcmc_por2); + + pcmp->pcmc_pbr3 = CFG_PCMCIA_PBR3; + pcmp->pcmc_por3 = CFG_PCMCIA_POR3 +#if (CFG_PCMCIA_POR3 != 0) + | timings +#endif + ; + PRINTF ("PBR3: %08x POR3: %08x\n", pcmp->pcmc_pbr3, pcmp->pcmc_por3); + + /* IDE 1 + */ + pcmp->pcmc_pbr4 = CFG_PCMCIA_PBR4; + pcmp->pcmc_por4 = CFG_PCMCIA_POR4 +#if (CFG_PCMCIA_POR4 != 0) + | timings +#endif + ; + PRINTF ("PBR4: %08x POR4: %08x\n", pcmp->pcmc_pbr4, pcmp->pcmc_por4); + + pcmp->pcmc_pbr5 = CFG_PCMCIA_PBR5; + pcmp->pcmc_por5 = CFG_PCMCIA_POR5 +#if (CFG_PCMCIA_POR5 != 0) + | timings +#endif + ; + PRINTF ("PBR5: %08x POR5: %08x\n", pcmp->pcmc_pbr5, pcmp->pcmc_por5); + + pcmp->pcmc_pbr6 = CFG_PCMCIA_PBR6; + pcmp->pcmc_por6 = CFG_PCMCIA_POR6 +#if (CFG_PCMCIA_POR6 != 0) + | timings +#endif + ; + PRINTF ("PBR6: %08x POR6: %08x\n", pcmp->pcmc_pbr6, pcmp->pcmc_por6); + + pcmp->pcmc_pbr7 = CFG_PCMCIA_PBR7; + pcmp->pcmc_por7 = CFG_PCMCIA_POR7 +#if (CFG_PCMCIA_POR7 != 0) + | timings +#endif + ; + PRINTF ("PBR7: %08x POR7: %08x\n", pcmp->pcmc_pbr7, pcmp->pcmc_por7); + +} + +#endif /* CONFIG_IDE_8xx_DIRECT */ + +/* ------------------------------------------------------------------------- */ + +static void __inline__ +outb(int dev, int port, unsigned char val) +{ + /* Ensure I/O operations complete */ + __asm__ volatile("eieio"); + *((uchar *)(ATA_CURR_BASE(dev)+port)) = val; +#if 0 + printf ("OUTB: 0x%08lx <== 0x%02x\n", ATA_CURR_BASE(dev)+port, val); +#endif +} + +static unsigned char __inline__ +inb(int dev, int port) +{ + uchar val; + /* Ensure I/O operations complete */ + __asm__ volatile("eieio"); + val = *((uchar *)(ATA_CURR_BASE(dev)+port)); +#if 0 + printf ("INB: 0x%08lx ==> 0x%02x\n", ATA_CURR_BASE(dev)+port, val); +#endif + return (val); +} + +__inline__ unsigned ld_le16(const volatile unsigned short *addr) +{ + unsigned val; + + __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r"(val) : "r"(addr), "m"(*addr)); + return val; +} + +static void +input_swap_data(int dev, ulong *sect_buf, int words) +{ + volatile ushort *pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG); + ushort *dbuf = (ushort *)sect_buf; + + while (words--) { + *dbuf++ = ld_le16(pbuf); + *dbuf++ = ld_le16(pbuf); + } +} + +static void +output_data(int dev, ulong *sect_buf, int words) +{ + ushort *dbuf; + volatile ushort *pbuf; + + pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG); + dbuf = (ushort *)sect_buf; + while (words--) { + __asm__ volatile ("eieio"); + *pbuf = *dbuf++; + __asm__ volatile ("eieio"); + *pbuf = *dbuf++; + } +} + +static void +input_data(int dev, ulong *sect_buf, int words) +{ + ushort *dbuf; + volatile ushort *pbuf; + + pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG); + dbuf = (ushort *)sect_buf; + while (words--) { + __asm__ volatile ("eieio"); + *dbuf++ = *pbuf; + __asm__ volatile ("eieio"); + *dbuf++ = *pbuf; + } +} + +/* ------------------------------------------------------------------------- + */ +static void ide_ident (block_dev_desc_t *dev_desc) +{ + ulong iobuf[ATA_SECTORWORDS]; + unsigned char c; + hd_driveid_t *iop = (hd_driveid_t *)iobuf; + +#if 0 + int mode, cycle_time; +#endif + int device; + device=dev_desc->dev; + printf (" Device %d: ", device); + + ide_led (DEVICE_LED(device), 1); /* LED on */ + /* Select device + */ + outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device)); + dev_desc->if_type=IF_TYPE_IDE; +#ifdef CONFIG_ATAPI + /* check signature */ + if ((inb(device,ATA_SECT_CNT)==0x01) && + (inb(device,ATA_SECT_NUM)==0x01) && + (inb(device,ATA_CYL_LOW)==0x14) && + (inb(device,ATA_CYL_HIGH)==0xEB)) { + /* ATAPI Signature found */ + dev_desc->if_type=IF_TYPE_ATAPI; + /* Start Ident Command + */ + outb (device, ATA_COMMAND, ATAPI_CMD_IDENT); + /* + * Wait for completion - ATAPI devices need more time + * to become ready + */ + c = ide_wait (device, ATAPI_TIME_OUT); + } + else +#endif + { + /* Start Ident Command + */ + outb (device, ATA_COMMAND, ATA_CMD_IDENT); + + /* Wait for completion + */ + c = ide_wait (device, IDE_TIME_OUT); + } + ide_led (DEVICE_LED(device), 0); /* LED off */ + + if (((c & ATA_STAT_DRQ) == 0) || + ((c & (ATA_STAT_FAULT|ATA_STAT_ERR)) != 0) ) { + dev_desc->type=DEV_TYPE_UNKNOWN; + return; + } + + input_swap_data (device, iobuf, ATA_SECTORWORDS); + + ident_cpy (dev_desc->revision, iop->fw_rev, sizeof(dev_desc->revision)); + ident_cpy (dev_desc->vendor, iop->model, sizeof(dev_desc->vendor)); + ident_cpy (dev_desc->product, iop->serial_no, sizeof(dev_desc->product)); + + if ((iop->config & 0x0080)==0x0080) + dev_desc->removable = 1; + else + dev_desc->removable = 0; + +#if 0 + /* + * Drive PIO mode autoselection + */ + mode = iop->tPIO; + + printf ("tPIO = 0x%02x = %d\n",mode, mode); + if (mode > 2) { /* 2 is maximum allowed tPIO value */ + mode = 2; + PRINTF ("Override tPIO -> 2\n"); + } + if (iop->field_valid & 2) { /* drive implements ATA2? */ + PRINTF ("Drive implements ATA2\n"); + if (iop->capability & 8) { /* drive supports use_iordy? */ + cycle_time = iop->eide_pio_iordy; + } else { + cycle_time = iop->eide_pio; + } + PRINTF ("cycle time = %d\n", cycle_time); + mode = 4; + if (cycle_time > 120) mode = 3; /* 120 ns for PIO mode 4 */ + if (cycle_time > 180) mode = 2; /* 180 ns for PIO mode 3 */ + if (cycle_time > 240) mode = 1; /* 240 ns for PIO mode 4 */ + if (cycle_time > 383) mode = 0; /* 383 ns for PIO mode 4 */ + } + printf ("PIO mode to use: PIO %d\n", mode); +#endif /* 0 */ + +#ifdef CONFIG_ATAPI + if (dev_desc->if_type==IF_TYPE_ATAPI) { + atapi_inquiry(dev_desc); + return; + } +#endif /* CONFIG_ATAPI */ + + /* swap shorts */ + dev_desc->lba = (iop->lba_capacity << 16) | (iop->lba_capacity >> 16); + /* assuming HD */ + dev_desc->type=DEV_TYPE_HARDDISK; + dev_desc->blksz=ATA_BLOCKSIZE; + dev_desc->lun=0; /* just to fill something in... */ + +#if 0 /* only used to test the powersaving mode, + * if enabled, the drive goes after 5 sec + * in standby mode */ + outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device)); + c = ide_wait (device, IDE_TIME_OUT); + outb (device, ATA_SECT_CNT, 1); + outb (device, ATA_LBA_LOW, 0); + outb (device, ATA_LBA_MID, 0); + outb (device, ATA_LBA_HIGH, 0); + outb (device, ATA_DEV_HD, ATA_LBA | + ATA_DEVICE(device)); + outb (device, ATA_COMMAND, 0xe3); + udelay (50); + c = ide_wait (device, IDE_TIME_OUT); /* can't take over 500 ms */ +#endif +} + + +/* ------------------------------------------------------------------------- */ + +ulong ide_read (int device, ulong blknr, ulong blkcnt, ulong *buffer) +{ + ulong n = 0; + unsigned char c; + unsigned char pwrsave=0; /* power save */ + + PRINTF ("ide_read dev %d start %lX, blocks %lX buffer at %lX\n", + device, blknr, blkcnt, (ulong)buffer); + + ide_led (DEVICE_LED(device), 1); /* LED on */ + + /* Select device + */ + outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device)); + c = ide_wait (device, IDE_TIME_OUT); + + if (c & ATA_STAT_BUSY) { + printf ("IDE read: device %d not ready\n", device); + goto IDE_READ_E; + } + + /* first check if the drive is in Powersaving mode, if yes, + * increase the timeout value */ + outb (device, ATA_COMMAND, ATA_CMD_CHK_PWR); + udelay (50); + + c = ide_wait (device, IDE_TIME_OUT); /* can't take over 500 ms */ + + if (c & ATA_STAT_BUSY) { + printf ("IDE read: device %d not ready\n", device); + goto IDE_READ_E; + } + if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) { + printf ("No Powersaving mode %X\n", c); + } else { + c = inb(device,ATA_SECT_CNT); + PRINTF("Powersaving %02X\n",c); + if(c==0) + pwrsave=1; + } + + + while (blkcnt-- > 0) { + + c = ide_wait (device, IDE_TIME_OUT); + + if (c & ATA_STAT_BUSY) { + printf ("IDE read: device %d not ready\n", device); + break; + } + + outb (device, ATA_SECT_CNT, 1); + outb (device, ATA_LBA_LOW, (blknr >> 0) & 0xFF); + outb (device, ATA_LBA_MID, (blknr >> 8) & 0xFF); + outb (device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF); + outb (device, ATA_DEV_HD, ATA_LBA | + ATA_DEVICE(device) | + ((blknr >> 24) & 0xF) ); + outb (device, ATA_COMMAND, ATA_CMD_READ); + + udelay (50); + + if(pwrsave) { + c = ide_wait (device, IDE_SPIN_UP_TIME_OUT); /* may take up to 4 sec */ + pwrsave=0; + } else { + c = ide_wait (device, IDE_TIME_OUT); /* can't take over 500 ms */ + } + + if ((c&(ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR)) != ATA_STAT_DRQ) { + printf ("Error (no IRQ) dev %d blk %ld: status 0x%02x\n", + device, blknr, c); + break; + } + + input_data (device, buffer, ATA_SECTORWORDS); + (void) inb (device, ATA_STATUS); /* clear IRQ */ + + ++n; + ++blknr; + buffer += ATA_SECTORWORDS; + } +IDE_READ_E: + ide_led (DEVICE_LED(device), 0); /* LED off */ + return (n); +} + +/* ------------------------------------------------------------------------- */ + + +ulong ide_write (int device, ulong blknr, ulong blkcnt, ulong *buffer) +{ + ulong n = 0; + unsigned char c; + + ide_led (DEVICE_LED(device), 1); /* LED on */ + + /* Select device + */ + outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device)); + + while (blkcnt-- > 0) { + + c = ide_wait (device, IDE_TIME_OUT); + + if (c & ATA_STAT_BUSY) { + printf ("IDE read: device %d not ready\n", device); + goto WR_OUT; + } + + outb (device, ATA_SECT_CNT, 1); + outb (device, ATA_LBA_LOW, (blknr >> 0) & 0xFF); + outb (device, ATA_LBA_MID, (blknr >> 8) & 0xFF); + outb (device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF); + outb (device, ATA_DEV_HD, ATA_LBA | + ATA_DEVICE(device) | + ((blknr >> 24) & 0xF) ); + outb (device, ATA_COMMAND, ATA_CMD_WRITE); + + udelay (50); + + c = ide_wait (device, IDE_TIME_OUT); /* can't take over 500 ms */ + + if ((c&(ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR)) != ATA_STAT_DRQ) { + printf ("Error (no IRQ) dev %d blk %ld: status 0x%02x\n", + device, blknr, c); + goto WR_OUT; + } + + output_data (device, buffer, ATA_SECTORWORDS); + c = inb (device, ATA_STATUS); /* clear IRQ */ + ++n; + ++blknr; + buffer += ATA_SECTORWORDS; + } +WR_OUT: + ide_led (DEVICE_LED(device), 0); /* LED off */ + return (n); +} + +/* ------------------------------------------------------------------------- */ + +/* + * copy src to dest, skipping leading and trailing blanks and null + * terminate the string + */ +static void ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len) +{ + int start,end; + + start=0; + while (start<len) { + if (src[start]!=' ') + break; + start++; + } + end=len-1; + while (end>start) { + if (src[end]!=' ') + break; + end--; + } + for ( ; start<=end; start++) { + *dest++=src[start]; + } + *dest='\0'; +} + +/* ------------------------------------------------------------------------- */ + +/* + * Wait until Busy bit is off, or timeout (in ms) + * Return last status + */ +static uchar ide_wait (int dev, ulong t) +{ + ulong delay = 10 * t; /* poll every 100 us */ + uchar c; + + while ((c = inb(dev, ATA_STATUS)) & ATA_STAT_BUSY) { + udelay (100); + if (delay-- == 0) { + break; + } + } + return (c); +} + +/* ------------------------------------------------------------------------- */ + +#ifdef CONFIG_IDE_RESET +extern void ide_set_reset(int idereset); + +static void ide_reset (void) +{ +#if defined(CFG_PB_12V_ENABLE) || defined(CFG_PB_IDE_MOTOR) + volatile immap_t *immr = (immap_t *)CFG_IMMR; +#endif + int i; + + curr_device = -1; + for (i=0; i<CFG_IDE_MAXBUS; ++i) + ide_bus_ok[i] = 0; + for (i=0; i<CFG_IDE_MAXDEVICE; ++i) + ide_dev_desc[i].type = DEV_TYPE_UNKNOWN; + + ide_set_reset (1); /* assert reset */ + + WATCHDOG_RESET(); + +#ifdef CFG_PB_12V_ENABLE + immr->im_cpm.cp_pbdat &= ~(CFG_PB_12V_ENABLE); /* 12V Enable output OFF */ + immr->im_cpm.cp_pbpar &= ~(CFG_PB_12V_ENABLE); + immr->im_cpm.cp_pbodr &= ~(CFG_PB_12V_ENABLE); + immr->im_cpm.cp_pbdir |= CFG_PB_12V_ENABLE; + + /* wait 500 ms for the voltage to stabilize + */ + for (i=0; i<500; ++i) { + udelay (1000); + } + + immr->im_cpm.cp_pbdat |= CFG_PB_12V_ENABLE; /* 12V Enable output ON */ +#endif /* CFG_PB_12V_ENABLE */ + +#ifdef CFG_PB_IDE_MOTOR + /* configure IDE Motor voltage monitor pin as input */ + immr->im_cpm.cp_pbpar &= ~(CFG_PB_IDE_MOTOR); + immr->im_cpm.cp_pbodr &= ~(CFG_PB_IDE_MOTOR); + immr->im_cpm.cp_pbdir &= ~(CFG_PB_IDE_MOTOR); + + /* wait up to 1 s for the motor voltage to stabilize + */ + for (i=0; i<1000; ++i) { + if ((immr->im_cpm.cp_pbdat & CFG_PB_IDE_MOTOR) != 0) { + break; + } + udelay (1000); + } + + if (i == 1000) { /* Timeout */ + printf ("\nWarning: 5V for IDE Motor missing\n"); +# ifdef CONFIG_STATUS_LED +# ifdef STATUS_LED_YELLOW + status_led_set (STATUS_LED_YELLOW, STATUS_LED_ON ); +# endif +# ifdef STATUS_LED_GREEN + status_led_set (STATUS_LED_GREEN, STATUS_LED_OFF); +# endif +# endif /* CONFIG_STATUS_LED */ + } +#endif /* CFG_PB_IDE_MOTOR */ + + WATCHDOG_RESET(); + + /* de-assert RESET signal */ + ide_set_reset(0); + + /* wait 250 ms */ + for (i=0; i<250; ++i) { + udelay (1000); + } +} + +#endif /* CONFIG_IDE_RESET */ + +/* ------------------------------------------------------------------------- */ + +#ifdef CONFIG_IDE_LED + +static uchar led_buffer = 0; /* Buffer for current LED status */ + +static void ide_led (uchar led, uchar status) +{ + uchar *led_port = LED_PORT; + + if (status) { /* switch LED on */ + led_buffer |= led; + } else { /* switch LED off */ + led_buffer &= ~led; + } + + *led_port = led_buffer; +} + +#endif /* CONFIG_IDE_LED */ + +/* ------------------------------------------------------------------------- */ + +#ifdef CONFIG_ATAPI +/**************************************************************************** + * ATAPI Support + */ + + + +#undef ATAPI_DEBUG + +#ifdef ATAPI_DEBUG +#define AT_PRINTF(fmt,args...) printf (fmt ,##args) +#else +#define AT_PRINTF(fmt,args...) +#endif + +/* since ATAPI may use commands with not 4 bytes alligned length + * we have our own transfer functions, 2 bytes alligned */ +static void +output_data_shorts(int dev, ushort *sect_buf, int shorts) +{ + ushort *dbuf; + volatile ushort *pbuf; + + pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG); + dbuf = (ushort *)sect_buf; + while (shorts--) { + __asm__ volatile ("eieio"); + *pbuf = *dbuf++; + } +} + +static void +input_data_shorts(int dev, ushort *sect_buf, int shorts) +{ + ushort *dbuf; + volatile ushort *pbuf; + + pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG); + dbuf = (ushort *)sect_buf; + while (shorts--) { + __asm__ volatile ("eieio"); + *dbuf++ = *pbuf; + } +} + +/* + * Wait until (Status & mask) == res, or timeout (in ms) + * Return last status + * This is used since some ATAPI CD ROMs clears their Busy Bit first + * and then they set their DRQ Bit + */ +static uchar atapi_wait_mask (int dev, ulong t,uchar mask, uchar res) +{ + ulong delay = 10 * t; /* poll every 100 us */ + uchar c; + + c = inb(dev,ATA_DEV_CTL); /* prevents to read the status before valid */ + while (((c = inb(dev, ATA_STATUS)) & mask) + != res) { + /* break if error occurs (doesn't make sense to wait more) */ + if((c & ATA_STAT_ERR)==ATA_STAT_ERR) + break; + udelay (100); + if (delay-- == 0) { + break; + } + } + return (c); +} + +/* + * issue an atapi command + */ +unsigned char atapi_issue(int device,unsigned char* ccb,int ccblen, unsigned char * buffer,int buflen) +{ + unsigned char c,err,mask,res; + int n; + ide_led (DEVICE_LED(device), 1); /* LED on */ + + /* Select device + */ + mask = ATA_STAT_BUSY|ATA_STAT_DRQ; + res = 0; + outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device)); + c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res); + if ((c & mask) != res) { + printf ("ATAPI_ISSUE: device %d not ready status %X\n", device,c); + err=0xFF; + goto AI_OUT; + } + /* write taskfile */ + outb (device, ATA_ERROR_REG, 0); /* no DMA, no overlaped */ + outb (device, ATA_CYL_LOW, (unsigned char)(buflen & 0xFF)); + outb (device, ATA_CYL_HIGH, (unsigned char)((buflen<<8) & 0xFF)); + outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device)); + + outb (device, ATA_COMMAND, ATAPI_CMD_PACKET); + udelay (50); + + mask = ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR; + res = ATA_STAT_DRQ; + c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res); + + if ((c & mask) != res) { /* DRQ must be 1, BSY 0 */ + printf ("ATTAPI_ISSUE: Error (no IRQ) before sending ccb dev %d status 0x%02x\n",device,c); + err=0xFF; + goto AI_OUT; + } + + output_data_shorts (device, (unsigned short *)ccb,ccblen/2); /* write command block */ + /* ATAPI Command written wait for completition */ + udelay (5000); /* device must set bsy */ + + mask = ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR; + /* if no data wait for DRQ = 0 BSY = 0 + * if data wait for DRQ = 1 BSY = 0 */ + res=0; + if(buflen) + res = ATA_STAT_DRQ; + c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res); + if ((c & mask) != res ) { + if (c & ATA_STAT_ERR) { + err=(inb(device,ATA_ERROR_REG))>>4; + AT_PRINTF("atapi_issue 1 returned sense key %X status %02X\n",err,c); + } else { + printf ("ATTAPI_ISSUE: (no DRQ) after sending ccb (%x) status 0x%02x\n", ccb[0],c); + err=0xFF; + } + goto AI_OUT; + } + n=inb(device, ATA_CYL_HIGH); + n<<=8; + n+=inb(device, ATA_CYL_LOW); + if(n>buflen) { + printf("ERROR, transfer bytes %d requested only %d\n",n,buflen); + err=0xff; + goto AI_OUT; + } + if((n==0)&&(buflen<0)) { + printf("ERROR, transfer bytes %d requested %d\n",n,buflen); + err=0xff; + goto AI_OUT; + } + if(n!=buflen) { + AT_PRINTF("WARNING, transfer bytes %d not equal with requested %d\n",n,buflen); + } + if(n!=0) { /* data transfer */ + AT_PRINTF("ATAPI_ISSUE: %d Bytes to transfer\n",n); + /* we transfer shorts */ + n>>=1; + /* ok now decide if it is an in or output */ + if ((inb(device, ATA_SECT_CNT)&0x02)==0) { + AT_PRINTF("Write to device\n"); + output_data_shorts(device,(unsigned short *)buffer,n); + } else { + AT_PRINTF("Read from device @ %p shorts %d\n",buffer,n); + input_data_shorts(device,(unsigned short *)buffer,n); + } + } + udelay(5000); /* seems that some CD ROMs need this... */ + mask = ATA_STAT_BUSY|ATA_STAT_ERR; + res=0; + c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res); + if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) { + err=(inb(device,ATA_ERROR_REG) >> 4); + AT_PRINTF("atapi_issue 2 returned sense key %X status %X\n",err,c); + } else { + err = 0; + } +AI_OUT: + ide_led (DEVICE_LED(device), 0); /* LED off */ + return (err); +} + +/* + * sending the command to atapi_issue. If an status other than good + * returns, an request_sense will be issued + */ + +#define ATAPI_DRIVE_NOT_READY 100 +#define ATAPI_UNIT_ATTN 10 + +unsigned char atapi_issue_autoreq (int device, + unsigned char* ccb, + int ccblen, + unsigned char *buffer, + int buflen) +{ + unsigned char sense_data[18],sense_ccb[12]; + unsigned char res,key,asc,ascq; + int notready,unitattn; + + unitattn=ATAPI_UNIT_ATTN; + notready=ATAPI_DRIVE_NOT_READY; + +retry: + res= atapi_issue(device,ccb,ccblen,buffer,buflen); + if (res==0) + return (0); /* Ok */ + + if (res==0xFF) + return (0xFF); /* error */ + + AT_PRINTF("(auto_req)atapi_issue returned sense key %X\n",res); + + memset(sense_ccb,0,sizeof(sense_ccb)); + memset(sense_data,0,sizeof(sense_data)); + sense_ccb[0]=ATAPI_CMD_REQ_SENSE; + sense_ccb[4]=18; /* allocation Legnth */ + + res=atapi_issue(device,sense_ccb,12,sense_data,18); + key=(sense_data[2]&0xF); + asc=(sense_data[12]); + ascq=(sense_data[13]); + + AT_PRINTF("ATAPI_CMD_REQ_SENSE returned %x\n",res); + AT_PRINTF(" Sense page: %02X key %02X ASC %02X ASCQ %02X\n", + sense_data[0], + key, + asc, + ascq); + + if((key==0)) + return 0; /* ok device ready */ + + if((key==6)|| (asc==0x29) || (asc==0x28)) { /* Unit Attention */ + if(unitattn-->0) { + udelay(200*1000); + goto retry; + } + printf("Unit Attention, tried %d\n",ATAPI_UNIT_ATTN); + goto error; + } + if((asc==0x4) && (ascq==0x1)) { /* not ready, but will be ready soon */ + if (notready-->0) { + udelay(200*1000); + goto retry; + } + printf("Drive not ready, tried %d times\n",ATAPI_DRIVE_NOT_READY); + goto error; + } + if(asc==0x3a) { + AT_PRINTF("Media not present\n"); + goto error; + } + printf ("ERROR: Unknown Sense key %02X ASC %02X ASCQ %02X\n",key,asc,ascq); +error: + AT_PRINTF ("ERROR Sense key %02X ASC %02X ASCQ %02X\n",key,asc,ascq); + return (0xFF); +} + + + +static void atapi_inquiry(block_dev_desc_t * dev_desc) +{ + unsigned char ccb[12]; /* Command descriptor block */ + unsigned char iobuf[64]; /* temp buf */ + unsigned char c; + int device; + + device=dev_desc->dev; + dev_desc->type=DEV_TYPE_UNKNOWN; /* not yet valid */ + dev_desc->block_read=atapi_read; + + memset(ccb,0,sizeof(ccb)); + memset(iobuf,0,sizeof(iobuf)); + + ccb[0]=ATAPI_CMD_INQUIRY; + ccb[4]=40; /* allocation Legnth */ + c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,40); + + AT_PRINTF("ATAPI_CMD_INQUIRY returned %x\n",c); + if (c!=0) + return; + + /* copy device ident strings */ + ident_cpy(dev_desc->vendor,&iobuf[8],8); + ident_cpy(dev_desc->product,&iobuf[16],16); + ident_cpy(dev_desc->revision,&iobuf[32],5); + + dev_desc->lun=0; + dev_desc->lba=0; + dev_desc->blksz=0; + dev_desc->type=iobuf[0] & 0x1f; + + if ((iobuf[1]&0x80)==0x80) + dev_desc->removable = 1; + else + dev_desc->removable = 0; + + memset(ccb,0,sizeof(ccb)); + memset(iobuf,0,sizeof(iobuf)); + ccb[0]=ATAPI_CMD_START_STOP; + ccb[4]=0x03; /* start */ + + c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,0); + + AT_PRINTF("ATAPI_CMD_START_STOP returned %x\n",c); + if (c!=0) + return; + + memset(ccb,0,sizeof(ccb)); + memset(iobuf,0,sizeof(iobuf)); + c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,0); + + AT_PRINTF("ATAPI_CMD_UNIT_TEST_READY returned %x\n",c); + if (c!=0) + return; + + memset(ccb,0,sizeof(ccb)); + memset(iobuf,0,sizeof(iobuf)); + ccb[0]=ATAPI_CMD_READ_CAP; + c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,8); + AT_PRINTF("ATAPI_CMD_READ_CAP returned %x\n",c); + if (c!=0) + return; + + AT_PRINTF("Read Cap: LBA %02X%02X%02X%02X blksize %02X%02X%02X%02X\n", + iobuf[0],iobuf[1],iobuf[2],iobuf[3], + iobuf[4],iobuf[5],iobuf[6],iobuf[7]); + + dev_desc->lba =((unsigned long)iobuf[0]<<24) + + ((unsigned long)iobuf[1]<<16) + + ((unsigned long)iobuf[2]<< 8) + + ((unsigned long)iobuf[3]); + dev_desc->blksz=((unsigned long)iobuf[4]<<24) + + ((unsigned long)iobuf[5]<<16) + + ((unsigned long)iobuf[6]<< 8) + + ((unsigned long)iobuf[7]); + return; +} + + +/* + * atapi_read: + * we transfer only one block per command, since the multiple DRQ per + * command is not yet implemented + */ +#define ATAPI_READ_MAX_BYTES 2048 /* we read max 2kbytes */ +#define ATAPI_READ_BLOCK_SIZE 2048 /* assuming CD part */ +#define ATAPI_READ_MAX_BLOCK ATAPI_READ_MAX_BYTES/ATAPI_READ_BLOCK_SIZE /* max blocks */ + +ulong atapi_read (int device, ulong blknr, ulong blkcnt, ulong *buffer) +{ + ulong n = 0; + unsigned char ccb[12]; /* Command descriptor block */ + ulong cnt; + + AT_PRINTF("atapi_read dev %d start %lX, blocks %lX buffer at %lX\n", + device, blknr, blkcnt, (ulong)buffer); + + do { + if (blkcnt>ATAPI_READ_MAX_BLOCK) { + cnt=ATAPI_READ_MAX_BLOCK; + } else { + cnt=blkcnt; + } + ccb[0]=ATAPI_CMD_READ_12; + ccb[1]=0; /* reserved */ + ccb[2]=(unsigned char) (blknr>>24) & 0xFF; /* MSB Block */ + ccb[3]=(unsigned char) (blknr>>16) & 0xFF; /* */ + ccb[4]=(unsigned char) (blknr>> 8) & 0xFF; + ccb[5]=(unsigned char) blknr & 0xFF; /* LSB Block */ + ccb[6]=(unsigned char) (cnt >>24) & 0xFF; /* MSB Block count */ + ccb[7]=(unsigned char) (cnt >>16) & 0xFF; + ccb[8]=(unsigned char) (cnt >> 8) & 0xFF; + ccb[9]=(unsigned char) cnt & 0xFF; /* LSB Block */ + ccb[10]=0; /* reserved */ + ccb[11]=0; /* reserved */ + + if (atapi_issue_autoreq(device,ccb,12, + (unsigned char *)buffer, + cnt*ATAPI_READ_BLOCK_SIZE) == 0xFF) { + return (n); + } + n+=cnt; + blkcnt-=cnt; + blknr+=cnt; + buffer+=cnt*(ATAPI_READ_BLOCK_SIZE/4); /* ulong blocksize in ulong */ + } while (blkcnt > 0); + return (n); +} + +/* ------------------------------------------------------------------------- */ + +#endif /* CONFIG_ATAPI */ + +#endif /* CONFIG_COMMANDS & CFG_CMD_IDE */ |
