aboutsummaryrefslogtreecommitdiff
path: root/hw/pxa2xx_mmci.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/pxa2xx_mmci.c')
-rw-r--r--hw/pxa2xx_mmci.c472
1 files changed, 472 insertions, 0 deletions
diff --git a/hw/pxa2xx_mmci.c b/hw/pxa2xx_mmci.c
new file mode 100644
index 0000000000..7515ab8875
--- /dev/null
+++ b/hw/pxa2xx_mmci.c
@@ -0,0 +1,472 @@
+/*
+ * Intel XScale PXA255/270 MultiMediaCard/SD/SDIO Controller emulation.
+ *
+ * Copyright (c) 2006 Openedhand Ltd.
+ * Written by Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This code is licensed under the GPLv2.
+ */
+
+#include "vl.h"
+#include "sd.h"
+
+struct pxa2xx_mmci_s {
+ target_phys_addr_t base;
+ qemu_irq irq;
+ void *dma;
+
+ SDState *card;
+
+ uint32_t status;
+ uint32_t clkrt;
+ uint32_t spi;
+ uint32_t cmdat;
+ uint32_t resp_tout;
+ uint32_t read_tout;
+ int blklen;
+ int numblk;
+ uint32_t intmask;
+ uint32_t intreq;
+ int cmd;
+ uint32_t arg;
+
+ int active;
+ int bytesleft;
+ uint8_t tx_fifo[64];
+ int tx_start;
+ int tx_len;
+ uint8_t rx_fifo[32];
+ int rx_start;
+ int rx_len;
+ uint16_t resp_fifo[9];
+ int resp_len;
+
+ int cmdreq;
+ int ac_width;
+};
+
+#define MMC_STRPCL 0x00 /* MMC Clock Start/Stop register */
+#define MMC_STAT 0x04 /* MMC Status register */
+#define MMC_CLKRT 0x08 /* MMC Clock Rate register */
+#define MMC_SPI 0x0c /* MMC SPI Mode register */
+#define MMC_CMDAT 0x10 /* MMC Command/Data register */
+#define MMC_RESTO 0x14 /* MMC Response Time-Out register */
+#define MMC_RDTO 0x18 /* MMC Read Time-Out register */
+#define MMC_BLKLEN 0x1c /* MMC Block Length register */
+#define MMC_NUMBLK 0x20 /* MMC Number of Blocks register */
+#define MMC_PRTBUF 0x24 /* MMC Buffer Partly Full register */
+#define MMC_I_MASK 0x28 /* MMC Interrupt Mask register */
+#define MMC_I_REG 0x2c /* MMC Interrupt Request register */
+#define MMC_CMD 0x30 /* MMC Command register */
+#define MMC_ARGH 0x34 /* MMC Argument High register */
+#define MMC_ARGL 0x38 /* MMC Argument Low register */
+#define MMC_RES 0x3c /* MMC Response FIFO */
+#define MMC_RXFIFO 0x40 /* MMC Receive FIFO */
+#define MMC_TXFIFO 0x44 /* MMC Transmit FIFO */
+#define MMC_RDWAIT 0x48 /* MMC RD_WAIT register */
+#define MMC_BLKS_REM 0x4c /* MMC Blocks Remaining register */
+
+/* Bitfield masks */
+#define STRPCL_STOP_CLK (1 << 0)
+#define STRPCL_STRT_CLK (1 << 1)
+#define STAT_TOUT_RES (1 << 1)
+#define STAT_CLK_EN (1 << 8)
+#define STAT_DATA_DONE (1 << 11)
+#define STAT_PRG_DONE (1 << 12)
+#define STAT_END_CMDRES (1 << 13)
+#define SPI_SPI_MODE (1 << 0)
+#define CMDAT_RES_TYPE (3 << 0)
+#define CMDAT_DATA_EN (1 << 2)
+#define CMDAT_WR_RD (1 << 3)
+#define CMDAT_DMA_EN (1 << 7)
+#define CMDAT_STOP_TRAN (1 << 10)
+#define INT_DATA_DONE (1 << 0)
+#define INT_PRG_DONE (1 << 1)
+#define INT_END_CMD (1 << 2)
+#define INT_STOP_CMD (1 << 3)
+#define INT_CLK_OFF (1 << 4)
+#define INT_RXFIFO_REQ (1 << 5)
+#define INT_TXFIFO_REQ (1 << 6)
+#define INT_TINT (1 << 7)
+#define INT_DAT_ERR (1 << 8)
+#define INT_RES_ERR (1 << 9)
+#define INT_RD_STALLED (1 << 10)
+#define INT_SDIO_INT (1 << 11)
+#define INT_SDIO_SACK (1 << 12)
+#define PRTBUF_PRT_BUF (1 << 0)
+
+/* Route internal interrupt lines to the global IC and DMA */
+static void pxa2xx_mmci_int_update(struct pxa2xx_mmci_s *s)
+{
+ uint32_t mask = s->intmask;
+ if (s->cmdat & CMDAT_DMA_EN) {
+ mask |= INT_RXFIFO_REQ | INT_TXFIFO_REQ;
+
+ pxa2xx_dma_request((struct pxa2xx_dma_state_s *) s->dma,
+ PXA2XX_RX_RQ_MMCI, !!(s->intreq & INT_RXFIFO_REQ));
+ pxa2xx_dma_request((struct pxa2xx_dma_state_s *) s->dma,
+ PXA2XX_TX_RQ_MMCI, !!(s->intreq & INT_TXFIFO_REQ));
+ }
+
+ qemu_set_irq(s->irq, !!(s->intreq & ~mask));
+}
+
+static void pxa2xx_mmci_fifo_update(struct pxa2xx_mmci_s *s)
+{
+ if (!s->active)
+ return;
+
+ if (s->cmdat & CMDAT_WR_RD) {
+ while (s->bytesleft && s->tx_len) {
+ sd_write_data(s->card, s->tx_fifo[s->tx_start ++]);
+ s->tx_start &= 0x1f;
+ s->tx_len --;
+ s->bytesleft --;
+ }
+ if (s->bytesleft)
+ s->intreq |= INT_TXFIFO_REQ;
+ } else
+ while (s->bytesleft && s->rx_len < 32) {
+ s->rx_fifo[(s->rx_start + (s->rx_len ++)) & 0x1f] =
+ sd_read_data(s->card);
+ s->bytesleft --;
+ s->intreq |= INT_RXFIFO_REQ;
+ }
+
+ if (!s->bytesleft) {
+ s->active = 0;
+ s->intreq |= INT_DATA_DONE;
+ s->status |= STAT_DATA_DONE;
+
+ if (s->cmdat & CMDAT_WR_RD) {
+ s->intreq |= INT_PRG_DONE;
+ s->status |= STAT_PRG_DONE;
+ }
+ }
+
+ pxa2xx_mmci_int_update(s);
+}
+
+static void pxa2xx_mmci_wakequeues(struct pxa2xx_mmci_s *s)
+{
+ int rsplen, i;
+ struct sd_request_s request;
+ uint8_t response[16];
+
+ s->active = 1;
+ s->rx_len = 0;
+ s->tx_len = 0;
+ s->cmdreq = 0;
+
+ request.cmd = s->cmd;
+ request.arg = s->arg;
+ request.crc = 0; /* FIXME */
+
+ rsplen = sd_do_command(s->card, &request, response);
+ s->intreq |= INT_END_CMD;
+
+ memset(s->resp_fifo, 0, sizeof(s->resp_fifo));
+ switch (s->cmdat & CMDAT_RES_TYPE) {
+#define PXAMMCI_RESP(wd, value0, value1) \
+ s->resp_fifo[(wd) + 0] |= (value0); \
+ s->resp_fifo[(wd) + 1] |= (value1) << 8;
+ case 0: /* No response */
+ goto complete;
+
+ case 1: /* R1, R4, R5 or R6 */
+ if (rsplen < 4)
+ goto timeout;
+ goto complete;
+
+ case 2: /* R2 */
+ if (rsplen < 16)
+ goto timeout;
+ goto complete;
+
+ case 3: /* R3 */
+ if (rsplen < 4)
+ goto timeout;
+ goto complete;
+
+ complete:
+ for (i = 0; rsplen > 0; i ++, rsplen -= 2) {
+ PXAMMCI_RESP(i, response[i * 2], response[i * 2 + 1]);
+ }
+ s->status |= STAT_END_CMDRES;
+
+ if (!(s->cmdat & CMDAT_DATA_EN))
+ s->active = 0;
+ else
+ s->bytesleft = s->numblk * s->blklen;
+
+ s->resp_len = 0;
+ break;
+
+ timeout:
+ s->active = 0;
+ s->status |= STAT_TOUT_RES;
+ break;
+ }
+
+ pxa2xx_mmci_fifo_update(s);
+}
+
+static uint32_t pxa2xx_mmci_read(void *opaque, target_phys_addr_t offset)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ uint32_t ret;
+ offset -= s->base;
+
+ switch (offset) {
+ case MMC_STRPCL:
+ return 0;
+ case MMC_STAT:
+ return s->status;
+ case MMC_CLKRT:
+ return s->clkrt;
+ case MMC_SPI:
+ return s->spi;
+ case MMC_CMDAT:
+ return s->cmdat;
+ case MMC_RESTO:
+ return s->resp_tout;
+ case MMC_RDTO:
+ return s->read_tout;
+ case MMC_BLKLEN:
+ return s->blklen;
+ case MMC_NUMBLK:
+ return s->numblk;
+ case MMC_PRTBUF:
+ return 0;
+ case MMC_I_MASK:
+ return s->intmask;
+ case MMC_I_REG:
+ return s->intreq;
+ case MMC_CMD:
+ return s->cmd | 0x40;
+ case MMC_ARGH:
+ return s->arg >> 16;
+ case MMC_ARGL:
+ return s->arg & 0xffff;
+ case MMC_RES:
+ if (s->resp_len < 9)
+ return s->resp_fifo[s->resp_len ++];
+ return 0;
+ case MMC_RXFIFO:
+ ret = 0;
+ while (s->ac_width -- && s->rx_len) {
+ ret |= s->rx_fifo[s->rx_start ++] << (s->ac_width << 3);
+ s->rx_start &= 0x1f;
+ s->rx_len --;
+ }
+ s->intreq &= ~INT_RXFIFO_REQ;
+ pxa2xx_mmci_fifo_update(s);
+ return ret;
+ case MMC_RDWAIT:
+ return 0;
+ case MMC_BLKS_REM:
+ return s->numblk;
+ default:
+ cpu_abort(cpu_single_env, "%s: Bad offset " REG_FMT "\n",
+ __FUNCTION__, offset);
+ }
+
+ return 0;
+}
+
+static void pxa2xx_mmci_write(void *opaque,
+ target_phys_addr_t offset, uint32_t value)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ offset -= s->base;
+
+ switch (offset) {
+ case MMC_STRPCL:
+ if (value & STRPCL_STRT_CLK) {
+ s->status |= STAT_CLK_EN;
+ s->intreq &= ~INT_CLK_OFF;
+
+ if (s->cmdreq && !(s->cmdat & CMDAT_STOP_TRAN)) {
+ s->status &= STAT_CLK_EN;
+ pxa2xx_mmci_wakequeues(s);
+ }
+ }
+
+ if (value & STRPCL_STOP_CLK) {
+ s->status &= ~STAT_CLK_EN;
+ s->intreq |= INT_CLK_OFF;
+ s->active = 0;
+ }
+
+ pxa2xx_mmci_int_update(s);
+ break;
+
+ case MMC_CLKRT:
+ s->clkrt = value & 7;
+ break;
+
+ case MMC_SPI:
+ s->spi = value & 0xf;
+ if (value & SPI_SPI_MODE)
+ printf("%s: attempted to use card in SPI mode\n", __FUNCTION__);
+ break;
+
+ case MMC_CMDAT:
+ s->cmdat = value & 0x3dff;
+ s->active = 0;
+ s->cmdreq = 1;
+ if (!(value & CMDAT_STOP_TRAN)) {
+ s->status &= STAT_CLK_EN;
+
+ if (s->status & STAT_CLK_EN)
+ pxa2xx_mmci_wakequeues(s);
+ }
+
+ pxa2xx_mmci_int_update(s);
+ break;
+
+ case MMC_RESTO:
+ s->resp_tout = value & 0x7f;
+ break;
+
+ case MMC_RDTO:
+ s->read_tout = value & 0xffff;
+ break;
+
+ case MMC_BLKLEN:
+ s->blklen = value & 0xfff;
+ break;
+
+ case MMC_NUMBLK:
+ s->numblk = value & 0xffff;
+ break;
+
+ case MMC_PRTBUF:
+ if (value & PRTBUF_PRT_BUF) {
+ s->tx_start ^= 32;
+ s->tx_len = 0;
+ }
+ pxa2xx_mmci_fifo_update(s);
+ break;
+
+ case MMC_I_MASK:
+ s->intmask = value & 0x1fff;
+ pxa2xx_mmci_int_update(s);
+ break;
+
+ case MMC_CMD:
+ s->cmd = value & 0x3f;
+ break;
+
+ case MMC_ARGH:
+ s->arg &= 0x0000ffff;
+ s->arg |= value << 16;
+ break;
+
+ case MMC_ARGL:
+ s->arg &= 0xffff0000;
+ s->arg |= value & 0x0000ffff;
+ break;
+
+ case MMC_TXFIFO:
+ while (s->ac_width -- && s->tx_len < 0x20)
+ s->tx_fifo[(s->tx_start + (s->tx_len ++)) & 0x1f] =
+ (value >> (s->ac_width << 3)) & 0xff;
+ s->intreq &= ~INT_TXFIFO_REQ;
+ pxa2xx_mmci_fifo_update(s);
+ break;
+
+ case MMC_RDWAIT:
+ case MMC_BLKS_REM:
+ break;
+
+ default:
+ cpu_abort(cpu_single_env, "%s: Bad offset " REG_FMT "\n",
+ __FUNCTION__, offset);
+ }
+}
+
+static uint32_t pxa2xx_mmci_readb(void *opaque, target_phys_addr_t offset)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ s->ac_width = 1;
+ return pxa2xx_mmci_read(opaque, offset);
+}
+
+static uint32_t pxa2xx_mmci_readh(void *opaque, target_phys_addr_t offset)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ s->ac_width = 2;
+ return pxa2xx_mmci_read(opaque, offset);
+}
+
+static uint32_t pxa2xx_mmci_readw(void *opaque, target_phys_addr_t offset)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ s->ac_width = 4;
+ return pxa2xx_mmci_read(opaque, offset);
+}
+
+static CPUReadMemoryFunc *pxa2xx_mmci_readfn[] = {
+ pxa2xx_mmci_readb,
+ pxa2xx_mmci_readh,
+ pxa2xx_mmci_readw
+};
+
+static void pxa2xx_mmci_writeb(void *opaque,
+ target_phys_addr_t offset, uint32_t value)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ s->ac_width = 1;
+ pxa2xx_mmci_write(opaque, offset, value);
+}
+
+static void pxa2xx_mmci_writeh(void *opaque,
+ target_phys_addr_t offset, uint32_t value)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ s->ac_width = 2;
+ pxa2xx_mmci_write(opaque, offset, value);
+}
+
+static void pxa2xx_mmci_writew(void *opaque,
+ target_phys_addr_t offset, uint32_t value)
+{
+ struct pxa2xx_mmci_s *s = (struct pxa2xx_mmci_s *) opaque;
+ s->ac_width = 4;
+ pxa2xx_mmci_write(opaque, offset, value);
+}
+
+static CPUWriteMemoryFunc *pxa2xx_mmci_writefn[] = {
+ pxa2xx_mmci_writeb,
+ pxa2xx_mmci_writeh,
+ pxa2xx_mmci_writew
+};
+
+struct pxa2xx_mmci_s *pxa2xx_mmci_init(target_phys_addr_t base,
+ qemu_irq irq, void *dma)
+{
+ int iomemtype;
+ struct pxa2xx_mmci_s *s;
+
+ s = (struct pxa2xx_mmci_s *) qemu_mallocz(sizeof(struct pxa2xx_mmci_s));
+ s->base = base;
+ s->irq = irq;
+ s->dma = dma;
+
+ iomemtype = cpu_register_io_memory(0, pxa2xx_mmci_readfn,
+ pxa2xx_mmci_writefn, s);
+ cpu_register_physical_memory(base, 0x000fffff, iomemtype);
+
+ /* Instantiate the actual storage */
+ s->card = sd_init(sd_bdrv);
+
+ return s;
+}
+
+void pxa2xx_mmci_handlers(struct pxa2xx_mmci_s *s, void *opaque,
+ void (*readonly_cb)(void *, int),
+ void (*coverswitch_cb)(void *, int))
+{
+ sd_set_cb(s->card, opaque, readonly_cb, coverswitch_cb);
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-23 20:44:29 +0000