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qemu/hw/sd/omap_mmc.c
Kevin Wolf 4f8a066b5f blockdev: Remove IF_* check for read-only blockdev_init 
IF_NONE allows read-only, which makes forbidding it in this place
for other types pretty much pointless.

Instead, make sure that all devices for which the check would have
errored out check in their init function that they don't get a read-only
BlockDriverState. This catches even cases where IF_NONE and -device is
used.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2013-10-11 16:50:01 +02:00

648 lines
16 KiB
C
Raw Blame History

/*
* OMAP on-chip MMC/SD host emulation.
*
* Copyright (C) 2006-2007 Andrzej Zaborowski <balrog@zabor.org>
*
* 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 or
* (at your option) version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "hw/hw.h"
#include "hw/arm/omap.h"
#include "hw/sd.h"
struct omap_mmc_s {
qemu_irq irq;
qemu_irq *dma;
qemu_irq coverswitch;
MemoryRegion iomem;
omap_clk clk;
SDState *card;
uint16_t last_cmd;
uint16_t sdio;
uint16_t rsp[8];
uint32_t arg;
int lines;
int dw;
int mode;
int enable;
int be;
int rev;
uint16_t status;
uint16_t mask;
uint8_t cto;
uint16_t dto;
int clkdiv;
uint16_t fifo[32];
int fifo_start;
int fifo_len;
uint16_t blen;
uint16_t blen_counter;
uint16_t nblk;
uint16_t nblk_counter;
int tx_dma;
int rx_dma;
int af_level;
int ae_level;
int ddir;
int transfer;
int cdet_wakeup;
int cdet_enable;
int cdet_state;
qemu_irq cdet;
};
static void omap_mmc_interrupts_update(struct omap_mmc_s *s)
{
qemu_set_irq(s->irq, !!(s->status & s->mask));
}
static void omap_mmc_fifolevel_update(struct omap_mmc_s *host)
{
if (!host->transfer && !host->fifo_len) {
host->status &= 0xf3ff;
return;
}
if (host->fifo_len > host->af_level && host->ddir) {
if (host->rx_dma) {
host->status &= 0xfbff;
qemu_irq_raise(host->dma[1]);
} else
host->status |= 0x0400;
} else {
host->status &= 0xfbff;
qemu_irq_lower(host->dma[1]);
}
if (host->fifo_len < host->ae_level && !host->ddir) {
if (host->tx_dma) {
host->status &= 0xf7ff;
qemu_irq_raise(host->dma[0]);
} else
host->status |= 0x0800;
} else {
qemu_irq_lower(host->dma[0]);
host->status &= 0xf7ff;
}
}
typedef enum {
sd_nore = 0, /* no response */
sd_r1, /* normal response command */
sd_r2, /* CID, CSD registers */
sd_r3, /* OCR register */
sd_r6 = 6, /* Published RCA response */
sd_r1b = -1,
} sd_rsp_type_t;
static void omap_mmc_command(struct omap_mmc_s *host, int cmd, int dir,
sd_cmd_type_t type, int busy, sd_rsp_type_t resptype, int init)
{
uint32_t rspstatus, mask;
int rsplen, timeout;
SDRequest request;
uint8_t response[16];
if (init && cmd == 0) {
host->status |= 0x0001;
return;
}
if (resptype == sd_r1 && busy)
resptype = sd_r1b;
if (type == sd_adtc) {
host->fifo_start = 0;
host->fifo_len = 0;
host->transfer = 1;
host->ddir = dir;
} else
host->transfer = 0;
timeout = 0;
mask = 0;
rspstatus = 0;
request.cmd = cmd;
request.arg = host->arg;
request.crc = 0; /* FIXME */
rsplen = sd_do_command(host->card, &request, response);
/* TODO: validate CRCs */
switch (resptype) {
case sd_nore:
rsplen = 0;
break;
case sd_r1:
case sd_r1b:
if (rsplen < 4) {
timeout = 1;
break;
}
rsplen = 4;
mask = OUT_OF_RANGE | ADDRESS_ERROR | BLOCK_LEN_ERROR |
ERASE_SEQ_ERROR | ERASE_PARAM | WP_VIOLATION |
LOCK_UNLOCK_FAILED | COM_CRC_ERROR | ILLEGAL_COMMAND |
CARD_ECC_FAILED | CC_ERROR | SD_ERROR |
CID_CSD_OVERWRITE;
if (host->sdio & (1 << 13))
mask |= AKE_SEQ_ERROR;
rspstatus = (response[0] << 24) | (response[1] << 16) |
(response[2] << 8) | (response[3] << 0);
break;
case sd_r2:
if (rsplen < 16) {
timeout = 1;
break;
}
rsplen = 16;
break;
case sd_r3:
if (rsplen < 4) {
timeout = 1;
break;
}
rsplen = 4;
rspstatus = (response[0] << 24) | (response[1] << 16) |
(response[2] << 8) | (response[3] << 0);
if (rspstatus & 0x80000000)
host->status &= 0xe000;
else
host->status |= 0x1000;
break;
case sd_r6:
if (rsplen < 4) {
timeout = 1;
break;
}
rsplen = 4;
mask = 0xe000 | AKE_SEQ_ERROR;
rspstatus = (response[2] << 8) | (response[3] << 0);
}
if (rspstatus & mask)
host->status |= 0x4000;
else
host->status &= 0xb000;
if (rsplen)
for (rsplen = 0; rsplen < 8; rsplen ++)
host->rsp[~rsplen & 7] = response[(rsplen << 1) | 1] |
(response[(rsplen << 1) | 0] << 8);
if (timeout)
host->status |= 0x0080;
else if (cmd == 12)
host->status |= 0x0005; /* Makes it more real */
else
host->status |= 0x0001;
}
static void omap_mmc_transfer(struct omap_mmc_s *host)
{
uint8_t value;
if (!host->transfer)
return;
while (1) {
if (host->ddir) {
if (host->fifo_len > host->af_level)
break;
value = sd_read_data(host->card);
host->fifo[(host->fifo_start + host->fifo_len) & 31] = value;
if (-- host->blen_counter) {
value = sd_read_data(host->card);
host->fifo[(host->fifo_start + host->fifo_len) & 31] |=
value << 8;
host->blen_counter --;
}
host->fifo_len ++;
} else {
if (!host->fifo_len)
break;
value = host->fifo[host->fifo_start] & 0xff;
sd_write_data(host->card, value);
if (-- host->blen_counter) {
value = host->fifo[host->fifo_start] >> 8;
sd_write_data(host->card, value);
host->blen_counter --;
}
host->fifo_start ++;
host->fifo_len --;
host->fifo_start &= 31;
}
if (host->blen_counter == 0) {
host->nblk_counter --;
host->blen_counter = host->blen;
if (host->nblk_counter == 0) {
host->nblk_counter = host->nblk;
host->transfer = 0;
host->status |= 0x0008;
break;
}
}
}
}
static void omap_mmc_update(void *opaque)
{
struct omap_mmc_s *s = opaque;
omap_mmc_transfer(s);
omap_mmc_fifolevel_update(s);
omap_mmc_interrupts_update(s);
}
void omap_mmc_reset(struct omap_mmc_s *host)
{
host->last_cmd = 0;
memset(host->rsp, 0, sizeof(host->rsp));
host->arg = 0;
host->dw = 0;
host->mode = 0;
host->enable = 0;
host->status = 0;
host->mask = 0;
host->cto = 0;
host->dto = 0;
host->fifo_len = 0;
host->blen = 0;
host->blen_counter = 0;
host->nblk = 0;
host->nblk_counter = 0;
host->tx_dma = 0;
host->rx_dma = 0;
host->ae_level = 0x00;
host->af_level = 0x1f;
host->transfer = 0;
host->cdet_wakeup = 0;
host->cdet_enable = 0;
qemu_set_irq(host->coverswitch, host->cdet_state);
host->clkdiv = 0;
}
static uint64_t omap_mmc_read(void *opaque, hwaddr offset,
unsigned size)
{
uint16_t i;
struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
if (size != 2) {
return omap_badwidth_read16(opaque, offset);
}
switch (offset) {
case 0x00: /* MMC_CMD */
return s->last_cmd;
case 0x04: /* MMC_ARGL */
return s->arg & 0x0000ffff;
case 0x08: /* MMC_ARGH */
return s->arg >> 16;
case 0x0c: /* MMC_CON */
return (s->dw << 15) | (s->mode << 12) | (s->enable << 11) |
(s->be << 10) | s->clkdiv;
case 0x10: /* MMC_STAT */
return s->status;
case 0x14: /* MMC_IE */
return s->mask;
case 0x18: /* MMC_CTO */
return s->cto;
case 0x1c: /* MMC_DTO */
return s->dto;
case 0x20: /* MMC_DATA */
/* TODO: support 8-bit access */
i = s->fifo[s->fifo_start];
if (s->fifo_len == 0) {
printf("MMC: FIFO underrun\n");
return i;
}
s->fifo_start ++;
s->fifo_len --;
s->fifo_start &= 31;
omap_mmc_transfer(s);
omap_mmc_fifolevel_update(s);
omap_mmc_interrupts_update(s);
return i;
case 0x24: /* MMC_BLEN */
return s->blen_counter;
case 0x28: /* MMC_NBLK */
return s->nblk_counter;
case 0x2c: /* MMC_BUF */
return (s->rx_dma << 15) | (s->af_level << 8) |
(s->tx_dma << 7) | s->ae_level;
case 0x30: /* MMC_SPI */
return 0x0000;
case 0x34: /* MMC_SDIO */
return (s->cdet_wakeup << 2) | (s->cdet_enable) | s->sdio;
case 0x38: /* MMC_SYST */
return 0x0000;
case 0x3c: /* MMC_REV */
return s->rev;
case 0x40: /* MMC_RSP0 */
case 0x44: /* MMC_RSP1 */
case 0x48: /* MMC_RSP2 */
case 0x4c: /* MMC_RSP3 */
case 0x50: /* MMC_RSP4 */
case 0x54: /* MMC_RSP5 */
case 0x58: /* MMC_RSP6 */
case 0x5c: /* MMC_RSP7 */
return s->rsp[(offset - 0x40) >> 2];
/* OMAP2-specific */
case 0x60: /* MMC_IOSR */
case 0x64: /* MMC_SYSC */
return 0;
case 0x68: /* MMC_SYSS */
return 1; /* RSTD */
}
OMAP_BAD_REG(offset);
return 0;
}
static void omap_mmc_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
int i;
struct omap_mmc_s *s = (struct omap_mmc_s *) opaque;
if (size != 2) {
return omap_badwidth_write16(opaque, offset, value);
}
switch (offset) {
case 0x00: /* MMC_CMD */
if (!s->enable)
break;
s->last_cmd = value;
for (i = 0; i < 8; i ++)
s->rsp[i] = 0x0000;
omap_mmc_command(s, value & 63, (value >> 15) & 1,
(sd_cmd_type_t) ((value >> 12) & 3),
(value >> 11) & 1,
(sd_rsp_type_t) ((value >> 8) & 7),
(value >> 7) & 1);
omap_mmc_update(s);
break;
case 0x04: /* MMC_ARGL */
s->arg &= 0xffff0000;
s->arg |= 0x0000ffff & value;
break;
case 0x08: /* MMC_ARGH */
s->arg &= 0x0000ffff;
s->arg |= value << 16;
break;
case 0x0c: /* MMC_CON */
s->dw = (value >> 15) & 1;
s->mode = (value >> 12) & 3;
s->enable = (value >> 11) & 1;
s->be = (value >> 10) & 1;
s->clkdiv = (value >> 0) & (s->rev >= 2 ? 0x3ff : 0xff);
if (s->mode != 0)
printf("SD mode %i unimplemented!\n", s->mode);
if (s->be != 0)
printf("SD FIFO byte sex unimplemented!\n");
if (s->dw != 0 && s->lines < 4)
printf("4-bit SD bus enabled\n");
if (!s->enable)
omap_mmc_reset(s);
break;
case 0x10: /* MMC_STAT */
s->status &= ~value;
omap_mmc_interrupts_update(s);
break;
case 0x14: /* MMC_IE */
s->mask = value & 0x7fff;
omap_mmc_interrupts_update(s);
break;
case 0x18: /* MMC_CTO */
s->cto = value & 0xff;
if (s->cto > 0xfd && s->rev <= 1)
printf("MMC: CTO of 0xff and 0xfe cannot be used!\n");
break;
case 0x1c: /* MMC_DTO */
s->dto = value & 0xffff;
break;
case 0x20: /* MMC_DATA */
/* TODO: support 8-bit access */
if (s->fifo_len == 32)
break;
s->fifo[(s->fifo_start + s->fifo_len) & 31] = value;
s->fifo_len ++;
omap_mmc_transfer(s);
omap_mmc_fifolevel_update(s);
omap_mmc_interrupts_update(s);
break;
case 0x24: /* MMC_BLEN */
s->blen = (value & 0x07ff) + 1;
s->blen_counter = s->blen;
break;
case 0x28: /* MMC_NBLK */
s->nblk = (value & 0x07ff) + 1;
s->nblk_counter = s->nblk;
s->blen_counter = s->blen;
break;
case 0x2c: /* MMC_BUF */
s->rx_dma = (value >> 15) & 1;
s->af_level = (value >> 8) & 0x1f;
s->tx_dma = (value >> 7) & 1;
s->ae_level = value & 0x1f;
if (s->rx_dma)
s->status &= 0xfbff;
if (s->tx_dma)
s->status &= 0xf7ff;
omap_mmc_fifolevel_update(s);
omap_mmc_interrupts_update(s);
break;
/* SPI, SDIO and TEST modes unimplemented */
case 0x30: /* MMC_SPI (OMAP1 only) */
break;
case 0x34: /* MMC_SDIO */
s->sdio = value & (s->rev >= 2 ? 0xfbf3 : 0x2020);
s->cdet_wakeup = (value >> 9) & 1;
s->cdet_enable = (value >> 2) & 1;
break;
case 0x38: /* MMC_SYST */
break;
case 0x3c: /* MMC_REV */
case 0x40: /* MMC_RSP0 */
case 0x44: /* MMC_RSP1 */
case 0x48: /* MMC_RSP2 */
case 0x4c: /* MMC_RSP3 */
case 0x50: /* MMC_RSP4 */
case 0x54: /* MMC_RSP5 */
case 0x58: /* MMC_RSP6 */
case 0x5c: /* MMC_RSP7 */
OMAP_RO_REG(offset);
break;
/* OMAP2-specific */
case 0x60: /* MMC_IOSR */
if (value & 0xf)
printf("MMC: SDIO bits used!\n");
break;
case 0x64: /* MMC_SYSC */
if (value & (1 << 2)) /* SRTS */
omap_mmc_reset(s);
break;
case 0x68: /* MMC_SYSS */
OMAP_RO_REG(offset);
break;
default:
OMAP_BAD_REG(offset);
}
}
static const MemoryRegionOps omap_mmc_ops = {
.read = omap_mmc_read,
.write = omap_mmc_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void omap_mmc_cover_cb(void *opaque, int line, int level)
{
struct omap_mmc_s *host = (struct omap_mmc_s *) opaque;
if (!host->cdet_state && level) {
host->status |= 0x0002;
omap_mmc_interrupts_update(host);
if (host->cdet_wakeup) {
/* TODO: Assert wake-up */
}
}
if (host->cdet_state != level) {
qemu_set_irq(host->coverswitch, level);
host->cdet_state = level;
}
}
struct omap_mmc_s *omap_mmc_init(hwaddr base,
MemoryRegion *sysmem,
BlockDriverState *bd,
qemu_irq irq, qemu_irq dma[], omap_clk clk)
{
struct omap_mmc_s *s = (struct omap_mmc_s *)
g_malloc0(sizeof(struct omap_mmc_s));
s->irq = irq;
s->dma = dma;
s->clk = clk;
s->lines = 1; /* TODO: needs to be settable per-board */
s->rev = 1;
omap_mmc_reset(s);
memory_region_init_io(&s->iomem, NULL, &omap_mmc_ops, s, "omap.mmc", 0x800);
memory_region_add_subregion(sysmem, base, &s->iomem);
/* Instantiate the storage */
s->card = sd_init(bd, false);
if (s->card == NULL) {
exit(1);
}
return s;
}
struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
BlockDriverState *bd, qemu_irq irq, qemu_irq dma[],
omap_clk fclk, omap_clk iclk)
{
struct omap_mmc_s *s = (struct omap_mmc_s *)
g_malloc0(sizeof(struct omap_mmc_s));
s->irq = irq;
s->dma = dma;
s->clk = fclk;
s->lines = 4;
s->rev = 2;
omap_mmc_reset(s);
memory_region_init_io(&s->iomem, NULL, &omap_mmc_ops, s, "omap.mmc",
omap_l4_region_size(ta, 0));
omap_l4_attach(ta, 0, &s->iomem);
/* Instantiate the storage */
s->card = sd_init(bd, false);
if (s->card == NULL) {
exit(1);
}
s->cdet = qemu_allocate_irqs(omap_mmc_cover_cb, s, 1)[0];
sd_set_cb(s->card, NULL, s->cdet);
return s;
}
void omap_mmc_handlers(struct omap_mmc_s *s, qemu_irq ro, qemu_irq cover)
{
if (s->cdet) {
sd_set_cb(s->card, ro, s->cdet);
s->coverswitch = cover;
qemu_set_irq(cover, s->cdet_state);
} else
sd_set_cb(s->card, ro, cover);
}
void omap_mmc_enable(struct omap_mmc_s *s, int enable)
{
sd_enable(s->card, enable);
}
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