#include <linux/reset.h>
#define DRIVER_NAME "sirfsoc_spi"
-
-#define SIRFSOC_SPI_CTRL 0x0000
-#define SIRFSOC_SPI_CMD 0x0004
-#define SIRFSOC_SPI_TX_RX_EN 0x0008
-#define SIRFSOC_SPI_INT_EN 0x000C
-#define SIRFSOC_SPI_INT_STATUS 0x0010
-#define SIRFSOC_SPI_TX_DMA_IO_CTRL 0x0100
-#define SIRFSOC_SPI_TX_DMA_IO_LEN 0x0104
-#define SIRFSOC_SPI_TXFIFO_CTRL 0x0108
-#define SIRFSOC_SPI_TXFIFO_LEVEL_CHK 0x010C
-#define SIRFSOC_SPI_TXFIFO_OP 0x0110
-#define SIRFSOC_SPI_TXFIFO_STATUS 0x0114
-#define SIRFSOC_SPI_TXFIFO_DATA 0x0118
-#define SIRFSOC_SPI_RX_DMA_IO_CTRL 0x0120
-#define SIRFSOC_SPI_RX_DMA_IO_LEN 0x0124
-#define SIRFSOC_SPI_RXFIFO_CTRL 0x0128
-#define SIRFSOC_SPI_RXFIFO_LEVEL_CHK 0x012C
-#define SIRFSOC_SPI_RXFIFO_OP 0x0130
-#define SIRFSOC_SPI_RXFIFO_STATUS 0x0134
-#define SIRFSOC_SPI_RXFIFO_DATA 0x0138
-#define SIRFSOC_SPI_DUMMY_DELAY_CTL 0x0144
-
/* SPI CTRL register defines */
#define SIRFSOC_SPI_SLV_MODE BIT(16)
#define SIRFSOC_SPI_CMD_MODE BIT(17)
#define SIRFSOC_SPI_TXFIFO_THD_INT_EN BIT(9)
#define SIRFSOC_SPI_FRM_END_INT_EN BIT(10)
-#define SIRFSOC_SPI_INT_MASK_ALL 0x1FFF
-
/* Interrupt status */
#define SIRFSOC_SPI_RX_DONE BIT(0)
#define SIRFSOC_SPI_TX_DONE BIT(1)
#define SIRFSOC_SPI_FIFO_WIDTH_BYTE (0 << 0)
#define SIRFSOC_SPI_FIFO_WIDTH_WORD (1 << 0)
#define SIRFSOC_SPI_FIFO_WIDTH_DWORD (2 << 0)
-
-/* FIFO Status */
-#define SIRFSOC_SPI_FIFO_LEVEL_MASK 0xFF
-#define SIRFSOC_SPI_FIFO_FULL BIT(8)
-#define SIRFSOC_SPI_FIFO_EMPTY BIT(9)
-
-/* 256 bytes rx/tx FIFO */
-#define SIRFSOC_SPI_FIFO_SIZE 256
-#define SIRFSOC_SPI_DAT_FRM_LEN_MAX (64 * 1024)
-
-#define SIRFSOC_SPI_FIFO_SC(x) ((x) & 0x3F)
-#define SIRFSOC_SPI_FIFO_LC(x) (((x) & 0x3F) << 10)
-#define SIRFSOC_SPI_FIFO_HC(x) (((x) & 0x3F) << 20)
-#define SIRFSOC_SPI_FIFO_THD(x) (((x) & 0xFF) << 2)
+/* USP related */
+#define SIRFSOC_USP_SYNC_MODE BIT(0)
+#define SIRFSOC_USP_SLV_MODE BIT(1)
+#define SIRFSOC_USP_LSB BIT(4)
+#define SIRFSOC_USP_EN BIT(5)
+#define SIRFSOC_USP_RXD_FALLING_EDGE BIT(6)
+#define SIRFSOC_USP_TXD_FALLING_EDGE BIT(7)
+#define SIRFSOC_USP_CS_HIGH_VALID BIT(9)
+#define SIRFSOC_USP_SCLK_IDLE_STAT BIT(11)
+#define SIRFSOC_USP_TFS_IO_MODE BIT(14)
+#define SIRFSOC_USP_TFS_IO_INPUT BIT(19)
+
+#define SIRFSOC_USP_RXD_DELAY_LEN_MASK 0xFF
+#define SIRFSOC_USP_TXD_DELAY_LEN_MASK 0xFF
+#define SIRFSOC_USP_RXD_DELAY_OFFSET 0
+#define SIRFSOC_USP_TXD_DELAY_OFFSET 8
+#define SIRFSOC_USP_RXD_DELAY_LEN 1
+#define SIRFSOC_USP_TXD_DELAY_LEN 1
+#define SIRFSOC_USP_CLK_DIVISOR_OFFSET 21
+#define SIRFSOC_USP_CLK_DIVISOR_MASK 0x3FF
+#define SIRFSOC_USP_CLK_10_11_MASK 0x3
+#define SIRFSOC_USP_CLK_10_11_OFFSET 30
+#define SIRFSOC_USP_CLK_12_15_MASK 0xF
+#define SIRFSOC_USP_CLK_12_15_OFFSET 24
+
+#define SIRFSOC_USP_TX_DATA_OFFSET 0
+#define SIRFSOC_USP_TX_SYNC_OFFSET 8
+#define SIRFSOC_USP_TX_FRAME_OFFSET 16
+#define SIRFSOC_USP_TX_SHIFTER_OFFSET 24
+
+#define SIRFSOC_USP_TX_DATA_MASK 0xFF
+#define SIRFSOC_USP_TX_SYNC_MASK 0xFF
+#define SIRFSOC_USP_TX_FRAME_MASK 0xFF
+#define SIRFSOC_USP_TX_SHIFTER_MASK 0x1F
+
+#define SIRFSOC_USP_RX_DATA_OFFSET 0
+#define SIRFSOC_USP_RX_FRAME_OFFSET 8
+#define SIRFSOC_USP_RX_SHIFTER_OFFSET 16
+
+#define SIRFSOC_USP_RX_DATA_MASK 0xFF
+#define SIRFSOC_USP_RX_FRAME_MASK 0xFF
+#define SIRFSOC_USP_RX_SHIFTER_MASK 0x1F
+#define SIRFSOC_USP_CS_HIGH_VALUE BIT(1)
+
+#define SIRFSOC_SPI_FIFO_SC_OFFSET 0
+#define SIRFSOC_SPI_FIFO_LC_OFFSET 10
+#define SIRFSOC_SPI_FIFO_HC_OFFSET 20
+
+#define SIRFSOC_SPI_FIFO_FULL_MASK(s) (1 << ((s)->fifo_full_offset))
+#define SIRFSOC_SPI_FIFO_EMPTY_MASK(s) (1 << ((s)->fifo_full_offset + 1))
+#define SIRFSOC_SPI_FIFO_THD_MASK(s) ((s)->fifo_size - 1)
+#define SIRFSOC_SPI_FIFO_THD_OFFSET 2
+#define SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(s, val) \
+ ((val) & (s)->fifo_level_chk_mask)
+
+enum sirf_spi_type {
+ SIRF_REAL_SPI,
+ SIRF_USP_SPI_P2,
+ SIRF_USP_SPI_A7,
+};
/*
* only if the rx/tx buffer and transfer size are 4-bytes aligned, we use dma
#define SIRFSOC_MAX_CMD_BYTES 4
#define SIRFSOC_SPI_DEFAULT_FRQ 1000000
+struct sirf_spi_register {
+ /*SPI and USP-SPI common*/
+ u32 tx_rx_en;
+ u32 int_en;
+ u32 int_st;
+ u32 tx_dma_io_ctrl;
+ u32 tx_dma_io_len;
+ u32 txfifo_ctrl;
+ u32 txfifo_level_chk;
+ u32 txfifo_op;
+ u32 txfifo_st;
+ u32 txfifo_data;
+ u32 rx_dma_io_ctrl;
+ u32 rx_dma_io_len;
+ u32 rxfifo_ctrl;
+ u32 rxfifo_level_chk;
+ u32 rxfifo_op;
+ u32 rxfifo_st;
+ u32 rxfifo_data;
+ /*SPI self*/
+ u32 spi_ctrl;
+ u32 spi_cmd;
+ u32 spi_dummy_delay_ctrl;
+ /*USP-SPI self*/
+ u32 usp_mode1;
+ u32 usp_mode2;
+ u32 usp_tx_frame_ctrl;
+ u32 usp_rx_frame_ctrl;
+ u32 usp_pin_io_data;
+ u32 usp_risc_dsp_mode;
+ u32 usp_async_param_reg;
+ u32 usp_irda_x_mode_div;
+ u32 usp_sm_cfg;
+ u32 usp_int_en_clr;
+};
+
+static const struct sirf_spi_register real_spi_register = {
+ .tx_rx_en = 0x8,
+ .int_en = 0xc,
+ .int_st = 0x10,
+ .tx_dma_io_ctrl = 0x100,
+ .tx_dma_io_len = 0x104,
+ .txfifo_ctrl = 0x108,
+ .txfifo_level_chk = 0x10c,
+ .txfifo_op = 0x110,
+ .txfifo_st = 0x114,
+ .txfifo_data = 0x118,
+ .rx_dma_io_ctrl = 0x120,
+ .rx_dma_io_len = 0x124,
+ .rxfifo_ctrl = 0x128,
+ .rxfifo_level_chk = 0x12c,
+ .rxfifo_op = 0x130,
+ .rxfifo_st = 0x134,
+ .rxfifo_data = 0x138,
+ .spi_ctrl = 0x0,
+ .spi_cmd = 0x4,
+ .spi_dummy_delay_ctrl = 0x144,
+};
+
+static const struct sirf_spi_register usp_spi_register = {
+ .tx_rx_en = 0x10,
+ .int_en = 0x14,
+ .int_st = 0x18,
+ .tx_dma_io_ctrl = 0x100,
+ .tx_dma_io_len = 0x104,
+ .txfifo_ctrl = 0x108,
+ .txfifo_level_chk = 0x10c,
+ .txfifo_op = 0x110,
+ .txfifo_st = 0x114,
+ .txfifo_data = 0x118,
+ .rx_dma_io_ctrl = 0x120,
+ .rx_dma_io_len = 0x124,
+ .rxfifo_ctrl = 0x128,
+ .rxfifo_level_chk = 0x12c,
+ .rxfifo_op = 0x130,
+ .rxfifo_st = 0x134,
+ .rxfifo_data = 0x138,
+ .usp_mode1 = 0x0,
+ .usp_mode2 = 0x4,
+ .usp_tx_frame_ctrl = 0x8,
+ .usp_rx_frame_ctrl = 0xc,
+ .usp_pin_io_data = 0x1c,
+ .usp_risc_dsp_mode = 0x20,
+ .usp_async_param_reg = 0x24,
+ .usp_irda_x_mode_div = 0x28,
+ .usp_sm_cfg = 0x2c,
+ .usp_int_en_clr = 0x140,
+};
+
struct sirfsoc_spi {
struct spi_bitbang bitbang;
struct completion rx_done;
struct dma_chan *tx_chan;
dma_addr_t src_start;
dma_addr_t dst_start;
- void *dummypage;
int word_width; /* in bytes */
/*
*/
bool tx_by_cmd;
bool hw_cs;
+ enum sirf_spi_type type;
+ const struct sirf_spi_register *regs;
+ unsigned int fifo_size;
+ /* fifo empty offset is (fifo full offset + 1)*/
+ unsigned int fifo_full_offset;
+ /* fifo_level_chk_mask is (fifo_size/4 - 1) */
+ unsigned int fifo_level_chk_mask;
+ unsigned int dat_max_frm_len;
+};
+
+struct sirf_spi_comp_data {
+ const struct sirf_spi_register *regs;
+ enum sirf_spi_type type;
+ unsigned int dat_max_frm_len;
+ unsigned int fifo_size;
+ void (*hwinit)(struct sirfsoc_spi *sspi);
};
+static void sirfsoc_usp_hwinit(struct sirfsoc_spi *sspi)
+{
+ /* reset USP and let USP can operate */
+ writel(readl(sspi->base + sspi->regs->usp_mode1) &
+ ~SIRFSOC_USP_EN, sspi->base + sspi->regs->usp_mode1);
+ writel(readl(sspi->base + sspi->regs->usp_mode1) |
+ SIRFSOC_USP_EN, sspi->base + sspi->regs->usp_mode1);
+}
+
static void spi_sirfsoc_rx_word_u8(struct sirfsoc_spi *sspi)
{
u32 data;
u8 *rx = sspi->rx;
- data = readl(sspi->base + SIRFSOC_SPI_RXFIFO_DATA);
+ data = readl(sspi->base + sspi->regs->rxfifo_data);
if (rx) {
*rx++ = (u8) data;
data = *tx++;
sspi->tx = tx;
}
-
- writel(data, sspi->base + SIRFSOC_SPI_TXFIFO_DATA);
+ writel(data, sspi->base + sspi->regs->txfifo_data);
sspi->left_tx_word--;
}
u32 data;
u16 *rx = sspi->rx;
- data = readl(sspi->base + SIRFSOC_SPI_RXFIFO_DATA);
+ data = readl(sspi->base + sspi->regs->rxfifo_data);
if (rx) {
*rx++ = (u16) data;
sspi->tx = tx;
}
- writel(data, sspi->base + SIRFSOC_SPI_TXFIFO_DATA);
+ writel(data, sspi->base + sspi->regs->txfifo_data);
sspi->left_tx_word--;
}
u32 data;
u32 *rx = sspi->rx;
- data = readl(sspi->base + SIRFSOC_SPI_RXFIFO_DATA);
+ data = readl(sspi->base + sspi->regs->rxfifo_data);
if (rx) {
*rx++ = (u32) data;
sspi->tx = tx;
}
- writel(data, sspi->base + SIRFSOC_SPI_TXFIFO_DATA);
+ writel(data, sspi->base + sspi->regs->txfifo_data);
sspi->left_tx_word--;
}
static irqreturn_t spi_sirfsoc_irq(int irq, void *dev_id)
{
struct sirfsoc_spi *sspi = dev_id;
- u32 spi_stat = readl(sspi->base + SIRFSOC_SPI_INT_STATUS);
- if (sspi->tx_by_cmd && (spi_stat & SIRFSOC_SPI_FRM_END)) {
+ u32 spi_stat;
+
+ spi_stat = readl(sspi->base + sspi->regs->int_st);
+ if (sspi->tx_by_cmd && sspi->type == SIRF_REAL_SPI
+ && (spi_stat & SIRFSOC_SPI_FRM_END)) {
complete(&sspi->tx_done);
- writel(0x0, sspi->base + SIRFSOC_SPI_INT_EN);
- writel(SIRFSOC_SPI_INT_MASK_ALL,
- sspi->base + SIRFSOC_SPI_INT_STATUS);
+ writel(0x0, sspi->base + sspi->regs->int_en);
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
return IRQ_HANDLED;
}
-
/* Error Conditions */
if (spi_stat & SIRFSOC_SPI_RX_OFLOW ||
spi_stat & SIRFSOC_SPI_TX_UFLOW) {
complete(&sspi->tx_done);
complete(&sspi->rx_done);
- writel(0x0, sspi->base + SIRFSOC_SPI_INT_EN);
- writel(SIRFSOC_SPI_INT_MASK_ALL,
- sspi->base + SIRFSOC_SPI_INT_STATUS);
+ switch (sspi->type) {
+ case SIRF_REAL_SPI:
+ case SIRF_USP_SPI_P2:
+ writel(0x0, sspi->base + sspi->regs->int_en);
+ break;
+ case SIRF_USP_SPI_A7:
+ writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr);
+ break;
+ }
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
return IRQ_HANDLED;
}
if (spi_stat & SIRFSOC_SPI_TXFIFO_EMPTY)
complete(&sspi->tx_done);
- while (!(readl(sspi->base + SIRFSOC_SPI_INT_STATUS) &
+ while (!(readl(sspi->base + sspi->regs->int_st) &
SIRFSOC_SPI_RX_IO_DMA))
cpu_relax();
complete(&sspi->rx_done);
- writel(0x0, sspi->base + SIRFSOC_SPI_INT_EN);
- writel(SIRFSOC_SPI_INT_MASK_ALL,
- sspi->base + SIRFSOC_SPI_INT_STATUS);
+ switch (sspi->type) {
+ case SIRF_REAL_SPI:
+ case SIRF_USP_SPI_P2:
+ writel(0x0, sspi->base + sspi->regs->int_en);
+ break;
+ case SIRF_USP_SPI_A7:
+ writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr);
+ break;
+ }
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
return IRQ_HANDLED;
}
u32 cmd;
sspi = spi_master_get_devdata(spi->master);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
+ writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->txfifo_op);
memcpy(&cmd, sspi->tx, t->len);
if (sspi->word_width == 1 && !(spi->mode & SPI_LSB_FIRST))
cmd = cpu_to_be32(cmd) >>
if (sspi->word_width == 2 && t->len == 4 &&
(!(spi->mode & SPI_LSB_FIRST)))
cmd = ((cmd & 0xffff) << 16) | (cmd >> 16);
- writel(cmd, sspi->base + SIRFSOC_SPI_CMD);
+ writel(cmd, sspi->base + sspi->regs->spi_cmd);
writel(SIRFSOC_SPI_FRM_END_INT_EN,
- sspi->base + SIRFSOC_SPI_INT_EN);
+ sspi->base + sspi->regs->int_en);
writel(SIRFSOC_SPI_CMD_TX_EN,
- sspi->base + SIRFSOC_SPI_TX_RX_EN);
+ sspi->base + sspi->regs->tx_rx_en);
if (wait_for_completion_timeout(&sspi->tx_done, timeout) == 0) {
dev_err(&spi->dev, "cmd transfer timeout\n");
return;
int timeout = t->len * 10;
sspi = spi_master_get_devdata(spi->master);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(0, sspi->base + SIRFSOC_SPI_INT_EN);
- writel(SIRFSOC_SPI_INT_MASK_ALL, sspi->base + SIRFSOC_SPI_INT_STATUS);
- if (sspi->left_tx_word < SIRFSOC_SPI_DAT_FRM_LEN_MAX) {
- writel(readl(sspi->base + SIRFSOC_SPI_CTRL) |
- SIRFSOC_SPI_ENA_AUTO_CLR | SIRFSOC_SPI_MUL_DAT_MODE,
- sspi->base + SIRFSOC_SPI_CTRL);
- writel(sspi->left_tx_word - 1,
- sspi->base + SIRFSOC_SPI_TX_DMA_IO_LEN);
- writel(sspi->left_tx_word - 1,
- sspi->base + SIRFSOC_SPI_RX_DMA_IO_LEN);
+ writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->rxfifo_op);
+ writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op);
+ switch (sspi->type) {
+ case SIRF_REAL_SPI:
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->rxfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->txfifo_op);
+ writel(0, sspi->base + sspi->regs->int_en);
+ break;
+ case SIRF_USP_SPI_P2:
+ writel(0x0, sspi->base + sspi->regs->rxfifo_op);
+ writel(0x0, sspi->base + sspi->regs->txfifo_op);
+ writel(0, sspi->base + sspi->regs->int_en);
+ break;
+ case SIRF_USP_SPI_A7:
+ writel(0x0, sspi->base + sspi->regs->rxfifo_op);
+ writel(0x0, sspi->base + sspi->regs->txfifo_op);
+ writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr);
+ break;
+ }
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
+ if (sspi->left_tx_word < sspi->dat_max_frm_len) {
+ switch (sspi->type) {
+ case SIRF_REAL_SPI:
+ writel(readl(sspi->base + sspi->regs->spi_ctrl) |
+ SIRFSOC_SPI_ENA_AUTO_CLR |
+ SIRFSOC_SPI_MUL_DAT_MODE,
+ sspi->base + sspi->regs->spi_ctrl);
+ writel(sspi->left_tx_word - 1,
+ sspi->base + sspi->regs->tx_dma_io_len);
+ writel(sspi->left_tx_word - 1,
+ sspi->base + sspi->regs->rx_dma_io_len);
+ break;
+ case SIRF_USP_SPI_P2:
+ case SIRF_USP_SPI_A7:
+ /*USP simulate SPI, tx/rx_dma_io_len indicates bytes*/
+ writel(sspi->left_tx_word * sspi->word_width,
+ sspi->base + sspi->regs->tx_dma_io_len);
+ writel(sspi->left_tx_word * sspi->word_width,
+ sspi->base + sspi->regs->rx_dma_io_len);
+ break;
+ }
} else {
- writel(readl(sspi->base + SIRFSOC_SPI_CTRL),
- sspi->base + SIRFSOC_SPI_CTRL);
- writel(0, sspi->base + SIRFSOC_SPI_TX_DMA_IO_LEN);
- writel(0, sspi->base + SIRFSOC_SPI_RX_DMA_IO_LEN);
+ if (sspi->type == SIRF_REAL_SPI)
+ writel(readl(sspi->base + sspi->regs->spi_ctrl),
+ sspi->base + sspi->regs->spi_ctrl);
+ writel(0, sspi->base + sspi->regs->tx_dma_io_len);
+ writel(0, sspi->base + sspi->regs->rx_dma_io_len);
}
sspi->dst_start = dma_map_single(&spi->dev, sspi->rx, t->len,
(t->tx_buf != t->rx_buf) ?
dma_async_issue_pending(sspi->tx_chan);
dma_async_issue_pending(sspi->rx_chan);
writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN,
- sspi->base + SIRFSOC_SPI_TX_RX_EN);
+ sspi->base + sspi->regs->tx_rx_en);
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7) {
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->rxfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->txfifo_op);
+ }
if (wait_for_completion_timeout(&sspi->rx_done, timeout) == 0) {
dev_err(&spi->dev, "transfer timeout\n");
dmaengine_terminate_all(sspi->rx_chan);
*/
if (wait_for_completion_timeout(&sspi->tx_done, timeout) == 0) {
dev_err(&spi->dev, "transfer timeout\n");
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7)
+ writel(0, sspi->base + sspi->regs->tx_rx_en);
dmaengine_terminate_all(sspi->tx_chan);
}
dma_unmap_single(&spi->dev, sspi->src_start, t->len, DMA_TO_DEVICE);
dma_unmap_single(&spi->dev, sspi->dst_start, t->len, DMA_FROM_DEVICE);
/* TX, RX FIFO stop */
- writel(0, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(0, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- if (sspi->left_tx_word >= SIRFSOC_SPI_DAT_FRM_LEN_MAX)
- writel(0, sspi->base + SIRFSOC_SPI_TX_RX_EN);
+ writel(0, sspi->base + sspi->regs->rxfifo_op);
+ writel(0, sspi->base + sspi->regs->txfifo_op);
+ if (sspi->left_tx_word >= sspi->dat_max_frm_len)
+ writel(0, sspi->base + sspi->regs->tx_rx_en);
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7)
+ writel(0, sspi->base + sspi->regs->tx_rx_en);
}
static void spi_sirfsoc_pio_transfer(struct spi_device *spi,
{
struct sirfsoc_spi *sspi;
int timeout = t->len * 10;
+ unsigned int data_units;
sspi = spi_master_get_devdata(spi->master);
do {
writel(SIRFSOC_SPI_FIFO_RESET,
- sspi->base + SIRFSOC_SPI_RXFIFO_OP);
+ sspi->base + sspi->regs->rxfifo_op);
writel(SIRFSOC_SPI_FIFO_RESET,
- sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START,
- sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START,
- sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(0, sspi->base + SIRFSOC_SPI_INT_EN);
- writel(SIRFSOC_SPI_INT_MASK_ALL,
- sspi->base + SIRFSOC_SPI_INT_STATUS);
- writel(readl(sspi->base + SIRFSOC_SPI_CTRL) |
- SIRFSOC_SPI_MUL_DAT_MODE | SIRFSOC_SPI_ENA_AUTO_CLR,
- sspi->base + SIRFSOC_SPI_CTRL);
- writel(min(sspi->left_tx_word, (u32)(256 / sspi->word_width))
- - 1, sspi->base + SIRFSOC_SPI_TX_DMA_IO_LEN);
- writel(min(sspi->left_rx_word, (u32)(256 / sspi->word_width))
- - 1, sspi->base + SIRFSOC_SPI_RX_DMA_IO_LEN);
- while (!((readl(sspi->base + SIRFSOC_SPI_TXFIFO_STATUS)
- & SIRFSOC_SPI_FIFO_FULL)) && sspi->left_tx_word)
+ sspi->base + sspi->regs->txfifo_op);
+ switch (sspi->type) {
+ case SIRF_USP_SPI_P2:
+ writel(0x0, sspi->base + sspi->regs->rxfifo_op);
+ writel(0x0, sspi->base + sspi->regs->txfifo_op);
+ writel(0, sspi->base + sspi->regs->int_en);
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
+ writel(min((sspi->left_tx_word * sspi->word_width),
+ sspi->fifo_size),
+ sspi->base + sspi->regs->tx_dma_io_len);
+ writel(min((sspi->left_rx_word * sspi->word_width),
+ sspi->fifo_size),
+ sspi->base + sspi->regs->rx_dma_io_len);
+ break;
+ case SIRF_USP_SPI_A7:
+ writel(0x0, sspi->base + sspi->regs->rxfifo_op);
+ writel(0x0, sspi->base + sspi->regs->txfifo_op);
+ writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr);
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
+ writel(min((sspi->left_tx_word * sspi->word_width),
+ sspi->fifo_size),
+ sspi->base + sspi->regs->tx_dma_io_len);
+ writel(min((sspi->left_rx_word * sspi->word_width),
+ sspi->fifo_size),
+ sspi->base + sspi->regs->rx_dma_io_len);
+ break;
+ case SIRF_REAL_SPI:
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->rxfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->txfifo_op);
+ writel(0, sspi->base + sspi->regs->int_en);
+ writel(readl(sspi->base + sspi->regs->int_st),
+ sspi->base + sspi->regs->int_st);
+ writel(readl(sspi->base + sspi->regs->spi_ctrl) |
+ SIRFSOC_SPI_MUL_DAT_MODE |
+ SIRFSOC_SPI_ENA_AUTO_CLR,
+ sspi->base + sspi->regs->spi_ctrl);
+ data_units = sspi->fifo_size / sspi->word_width;
+ writel(min(sspi->left_tx_word, data_units) - 1,
+ sspi->base + sspi->regs->tx_dma_io_len);
+ writel(min(sspi->left_rx_word, data_units) - 1,
+ sspi->base + sspi->regs->rx_dma_io_len);
+ break;
+ }
+ while (!((readl(sspi->base + sspi->regs->txfifo_st)
+ & SIRFSOC_SPI_FIFO_FULL_MASK(sspi))) &&
+ sspi->left_tx_word)
sspi->tx_word(sspi);
writel(SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN |
SIRFSOC_SPI_TX_UFLOW_INT_EN |
SIRFSOC_SPI_RX_OFLOW_INT_EN |
SIRFSOC_SPI_RX_IO_DMA_INT_EN,
- sspi->base + SIRFSOC_SPI_INT_EN);
+ sspi->base + sspi->regs->int_en);
writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN,
- sspi->base + SIRFSOC_SPI_TX_RX_EN);
+ sspi->base + sspi->regs->tx_rx_en);
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7) {
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->rxfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START,
+ sspi->base + sspi->regs->txfifo_op);
+ }
if (!wait_for_completion_timeout(&sspi->tx_done, timeout) ||
!wait_for_completion_timeout(&sspi->rx_done, timeout)) {
dev_err(&spi->dev, "transfer timeout\n");
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7)
+ writel(0, sspi->base + sspi->regs->tx_rx_en);
break;
}
- while (!((readl(sspi->base + SIRFSOC_SPI_RXFIFO_STATUS)
- & SIRFSOC_SPI_FIFO_EMPTY)) && sspi->left_rx_word)
+ while (!((readl(sspi->base + sspi->regs->rxfifo_st)
+ & SIRFSOC_SPI_FIFO_EMPTY_MASK(sspi))) &&
+ sspi->left_rx_word)
sspi->rx_word(sspi);
- writel(0, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(0, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7)
+ writel(0, sspi->base + sspi->regs->tx_rx_en);
+ writel(0, sspi->base + sspi->regs->rxfifo_op);
+ writel(0, sspi->base + sspi->regs->txfifo_op);
} while (sspi->left_tx_word != 0 || sspi->left_rx_word != 0);
}
static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t)
{
struct sirfsoc_spi *sspi;
- sspi = spi_master_get_devdata(spi->master);
- sspi->tx = t->tx_buf ? t->tx_buf : sspi->dummypage;
- sspi->rx = t->rx_buf ? t->rx_buf : sspi->dummypage;
+ sspi = spi_master_get_devdata(spi->master);
+ sspi->tx = t->tx_buf;
+ sspi->rx = t->rx_buf;
sspi->left_tx_word = sspi->left_rx_word = t->len / sspi->word_width;
reinit_completion(&sspi->rx_done);
reinit_completion(&sspi->tx_done);
* null, just fill command data into command register and wait for its
* completion.
*/
- if (sspi->tx_by_cmd)
+ if (sspi->type == SIRF_REAL_SPI && sspi->tx_by_cmd)
spi_sirfsoc_cmd_transfer(spi, t);
else if (IS_DMA_VALID(t))
spi_sirfsoc_dma_transfer(spi, t);
struct sirfsoc_spi *sspi = spi_master_get_devdata(spi->master);
if (sspi->hw_cs) {
- u32 regval = readl(sspi->base + SIRFSOC_SPI_CTRL);
- switch (value) {
- case BITBANG_CS_ACTIVE:
- if (spi->mode & SPI_CS_HIGH)
- regval |= SIRFSOC_SPI_CS_IO_OUT;
- else
- regval &= ~SIRFSOC_SPI_CS_IO_OUT;
+ u32 regval;
+
+ switch (sspi->type) {
+ case SIRF_REAL_SPI:
+ regval = readl(sspi->base + sspi->regs->spi_ctrl);
+ switch (value) {
+ case BITBANG_CS_ACTIVE:
+ if (spi->mode & SPI_CS_HIGH)
+ regval |= SIRFSOC_SPI_CS_IO_OUT;
+ else
+ regval &= ~SIRFSOC_SPI_CS_IO_OUT;
+ break;
+ case BITBANG_CS_INACTIVE:
+ if (spi->mode & SPI_CS_HIGH)
+ regval &= ~SIRFSOC_SPI_CS_IO_OUT;
+ else
+ regval |= SIRFSOC_SPI_CS_IO_OUT;
+ break;
+ }
+ writel(regval, sspi->base + sspi->regs->spi_ctrl);
break;
- case BITBANG_CS_INACTIVE:
- if (spi->mode & SPI_CS_HIGH)
- regval &= ~SIRFSOC_SPI_CS_IO_OUT;
- else
- regval |= SIRFSOC_SPI_CS_IO_OUT;
+ case SIRF_USP_SPI_P2:
+ case SIRF_USP_SPI_A7:
+ regval = readl(sspi->base +
+ sspi->regs->usp_pin_io_data);
+ switch (value) {
+ case BITBANG_CS_ACTIVE:
+ if (spi->mode & SPI_CS_HIGH)
+ regval |= SIRFSOC_USP_CS_HIGH_VALUE;
+ else
+ regval &= ~(SIRFSOC_USP_CS_HIGH_VALUE);
+ break;
+ case BITBANG_CS_INACTIVE:
+ if (spi->mode & SPI_CS_HIGH)
+ regval &= ~(SIRFSOC_USP_CS_HIGH_VALUE);
+ else
+ regval |= SIRFSOC_USP_CS_HIGH_VALUE;
+ break;
+ }
+ writel(regval,
+ sspi->base + sspi->regs->usp_pin_io_data);
break;
}
- writel(regval, sspi->base + SIRFSOC_SPI_CTRL);
} else {
switch (value) {
case BITBANG_CS_ACTIVE:
}
}
+static int spi_sirfsoc_config_mode(struct spi_device *spi)
+{
+ struct sirfsoc_spi *sspi;
+ u32 regval, usp_mode1;
+
+ sspi = spi_master_get_devdata(spi->master);
+ regval = readl(sspi->base + sspi->regs->spi_ctrl);
+ usp_mode1 = readl(sspi->base + sspi->regs->usp_mode1);
+ if (!(spi->mode & SPI_CS_HIGH)) {
+ regval |= SIRFSOC_SPI_CS_IDLE_STAT;
+ usp_mode1 &= ~SIRFSOC_USP_CS_HIGH_VALID;
+ } else {
+ regval &= ~SIRFSOC_SPI_CS_IDLE_STAT;
+ usp_mode1 |= SIRFSOC_USP_CS_HIGH_VALID;
+ }
+ if (!(spi->mode & SPI_LSB_FIRST)) {
+ regval |= SIRFSOC_SPI_TRAN_MSB;
+ usp_mode1 &= ~SIRFSOC_USP_LSB;
+ } else {
+ regval &= ~SIRFSOC_SPI_TRAN_MSB;
+ usp_mode1 |= SIRFSOC_USP_LSB;
+ }
+ if (spi->mode & SPI_CPOL) {
+ regval |= SIRFSOC_SPI_CLK_IDLE_STAT;
+ usp_mode1 |= SIRFSOC_USP_SCLK_IDLE_STAT;
+ } else {
+ regval &= ~SIRFSOC_SPI_CLK_IDLE_STAT;
+ usp_mode1 &= ~SIRFSOC_USP_SCLK_IDLE_STAT;
+ }
+ /*
+ * Data should be driven at least 1/2 cycle before the fetch edge
+ * to make sure that data gets stable at the fetch edge.
+ */
+ if (((spi->mode & SPI_CPOL) && (spi->mode & SPI_CPHA)) ||
+ (!(spi->mode & SPI_CPOL) && !(spi->mode & SPI_CPHA))) {
+ regval &= ~SIRFSOC_SPI_DRV_POS_EDGE;
+ usp_mode1 |= (SIRFSOC_USP_TXD_FALLING_EDGE |
+ SIRFSOC_USP_RXD_FALLING_EDGE);
+ } else {
+ regval |= SIRFSOC_SPI_DRV_POS_EDGE;
+ usp_mode1 &= ~(SIRFSOC_USP_RXD_FALLING_EDGE |
+ SIRFSOC_USP_TXD_FALLING_EDGE);
+ }
+ writel((SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size - 2) <<
+ SIRFSOC_SPI_FIFO_SC_OFFSET) |
+ (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size / 2) <<
+ SIRFSOC_SPI_FIFO_LC_OFFSET) |
+ (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, 2) <<
+ SIRFSOC_SPI_FIFO_HC_OFFSET),
+ sspi->base + sspi->regs->txfifo_level_chk);
+ writel((SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, 2) <<
+ SIRFSOC_SPI_FIFO_SC_OFFSET) |
+ (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size / 2) <<
+ SIRFSOC_SPI_FIFO_LC_OFFSET) |
+ (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size - 2) <<
+ SIRFSOC_SPI_FIFO_HC_OFFSET),
+ sspi->base + sspi->regs->rxfifo_level_chk);
+ /*
+ * it should never set to hardware cs mode because in hardware cs mode,
+ * cs signal can't controlled by driver.
+ */
+ switch (sspi->type) {
+ case SIRF_REAL_SPI:
+ regval |= SIRFSOC_SPI_CS_IO_MODE;
+ writel(regval, sspi->base + sspi->regs->spi_ctrl);
+ break;
+ case SIRF_USP_SPI_P2:
+ case SIRF_USP_SPI_A7:
+ usp_mode1 |= SIRFSOC_USP_SYNC_MODE;
+ usp_mode1 |= SIRFSOC_USP_TFS_IO_MODE;
+ usp_mode1 &= ~SIRFSOC_USP_TFS_IO_INPUT;
+ writel(usp_mode1, sspi->base + sspi->regs->usp_mode1);
+ break;
+ }
+
+ return 0;
+}
+
static int
spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
{
struct sirfsoc_spi *sspi;
u8 bits_per_word = 0;
int hz = 0;
- u32 regval;
- u32 txfifo_ctrl, rxfifo_ctrl;
- u32 fifo_size = SIRFSOC_SPI_FIFO_SIZE / 4;
+ u32 regval, txfifo_ctrl, rxfifo_ctrl, tx_frm_ctl, rx_frm_ctl, usp_mode2;
sspi = spi_master_get_devdata(spi->master);
bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
hz = t && t->speed_hz ? t->speed_hz : spi->max_speed_hz;
- regval = (sspi->ctrl_freq / (2 * hz)) - 1;
+ usp_mode2 = regval = (sspi->ctrl_freq / (2 * hz)) - 1;
if (regval > 0xFFFF || regval < 0) {
dev_err(&spi->dev, "Speed %d not supported\n", hz);
return -EINVAL;
}
-
switch (bits_per_word) {
case 8:
regval |= SIRFSOC_SPI_TRAN_DAT_FORMAT_8;
sspi->tx_word = spi_sirfsoc_tx_word_u32;
break;
default:
- BUG();
+ dev_err(&spi->dev, "bpw %d not supported\n", bits_per_word);
+ return -EINVAL;
}
-
sspi->word_width = DIV_ROUND_UP(bits_per_word, 8);
- txfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) |
- (sspi->word_width >> 1);
- rxfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) |
- (sspi->word_width >> 1);
-
- if (!(spi->mode & SPI_CS_HIGH))
- regval |= SIRFSOC_SPI_CS_IDLE_STAT;
- if (!(spi->mode & SPI_LSB_FIRST))
- regval |= SIRFSOC_SPI_TRAN_MSB;
- if (spi->mode & SPI_CPOL)
- regval |= SIRFSOC_SPI_CLK_IDLE_STAT;
-
- /*
- * Data should be driven at least 1/2 cycle before the fetch edge
- * to make sure that data gets stable at the fetch edge.
- */
- if (((spi->mode & SPI_CPOL) && (spi->mode & SPI_CPHA)) ||
- (!(spi->mode & SPI_CPOL) && !(spi->mode & SPI_CPHA)))
- regval &= ~SIRFSOC_SPI_DRV_POS_EDGE;
- else
- regval |= SIRFSOC_SPI_DRV_POS_EDGE;
-
- writel(SIRFSOC_SPI_FIFO_SC(fifo_size - 2) |
- SIRFSOC_SPI_FIFO_LC(fifo_size / 2) |
- SIRFSOC_SPI_FIFO_HC(2),
- sspi->base + SIRFSOC_SPI_TXFIFO_LEVEL_CHK);
- writel(SIRFSOC_SPI_FIFO_SC(2) |
- SIRFSOC_SPI_FIFO_LC(fifo_size / 2) |
- SIRFSOC_SPI_FIFO_HC(fifo_size - 2),
- sspi->base + SIRFSOC_SPI_RXFIFO_LEVEL_CHK);
- writel(txfifo_ctrl, sspi->base + SIRFSOC_SPI_TXFIFO_CTRL);
- writel(rxfifo_ctrl, sspi->base + SIRFSOC_SPI_RXFIFO_CTRL);
-
- if (t && t->tx_buf && !t->rx_buf && (t->len <= SIRFSOC_MAX_CMD_BYTES)) {
- regval |= (SIRFSOC_SPI_CMD_BYTE_NUM((t->len - 1)) |
- SIRFSOC_SPI_CMD_MODE);
- sspi->tx_by_cmd = true;
- } else {
- regval &= ~SIRFSOC_SPI_CMD_MODE;
- sspi->tx_by_cmd = false;
+ txfifo_ctrl = (((sspi->fifo_size / 2) &
+ SIRFSOC_SPI_FIFO_THD_MASK(sspi))
+ << SIRFSOC_SPI_FIFO_THD_OFFSET) |
+ (sspi->word_width >> 1);
+ rxfifo_ctrl = (((sspi->fifo_size / 2) &
+ SIRFSOC_SPI_FIFO_THD_MASK(sspi))
+ << SIRFSOC_SPI_FIFO_THD_OFFSET) |
+ (sspi->word_width >> 1);
+ writel(txfifo_ctrl, sspi->base + sspi->regs->txfifo_ctrl);
+ writel(rxfifo_ctrl, sspi->base + sspi->regs->rxfifo_ctrl);
+ if (sspi->type == SIRF_USP_SPI_P2 ||
+ sspi->type == SIRF_USP_SPI_A7) {
+ tx_frm_ctl = 0;
+ tx_frm_ctl |= ((bits_per_word - 1) & SIRFSOC_USP_TX_DATA_MASK)
+ << SIRFSOC_USP_TX_DATA_OFFSET;
+ tx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_TXD_DELAY_LEN
+ - 1) & SIRFSOC_USP_TX_SYNC_MASK) <<
+ SIRFSOC_USP_TX_SYNC_OFFSET;
+ tx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_TXD_DELAY_LEN
+ + 2 - 1) & SIRFSOC_USP_TX_FRAME_MASK) <<
+ SIRFSOC_USP_TX_FRAME_OFFSET;
+ tx_frm_ctl |= ((bits_per_word - 1) &
+ SIRFSOC_USP_TX_SHIFTER_MASK) <<
+ SIRFSOC_USP_TX_SHIFTER_OFFSET;
+ rx_frm_ctl = 0;
+ rx_frm_ctl |= ((bits_per_word - 1) & SIRFSOC_USP_RX_DATA_MASK)
+ << SIRFSOC_USP_RX_DATA_OFFSET;
+ rx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_RXD_DELAY_LEN
+ + 2 - 1) & SIRFSOC_USP_RX_FRAME_MASK) <<
+ SIRFSOC_USP_RX_FRAME_OFFSET;
+ rx_frm_ctl |= ((bits_per_word - 1)
+ & SIRFSOC_USP_RX_SHIFTER_MASK) <<
+ SIRFSOC_USP_RX_SHIFTER_OFFSET;
+ writel(tx_frm_ctl | (((usp_mode2 >> 10) &
+ SIRFSOC_USP_CLK_10_11_MASK) <<
+ SIRFSOC_USP_CLK_10_11_OFFSET),
+ sspi->base + sspi->regs->usp_tx_frame_ctrl);
+ writel(rx_frm_ctl | (((usp_mode2 >> 12) &
+ SIRFSOC_USP_CLK_12_15_MASK) <<
+ SIRFSOC_USP_CLK_12_15_OFFSET),
+ sspi->base + sspi->regs->usp_rx_frame_ctrl);
+ writel(readl(sspi->base + sspi->regs->usp_mode2) |
+ ((usp_mode2 & SIRFSOC_USP_CLK_DIVISOR_MASK) <<
+ SIRFSOC_USP_CLK_DIVISOR_OFFSET) |
+ (SIRFSOC_USP_RXD_DELAY_LEN <<
+ SIRFSOC_USP_RXD_DELAY_OFFSET) |
+ (SIRFSOC_USP_TXD_DELAY_LEN <<
+ SIRFSOC_USP_TXD_DELAY_OFFSET),
+ sspi->base + sspi->regs->usp_mode2);
+ }
+ if (sspi->type == SIRF_REAL_SPI)
+ writel(regval, sspi->base + sspi->regs->spi_ctrl);
+ spi_sirfsoc_config_mode(spi);
+ if (sspi->type == SIRF_REAL_SPI) {
+ if (t && t->tx_buf && !t->rx_buf &&
+ (t->len <= SIRFSOC_MAX_CMD_BYTES)) {
+ sspi->tx_by_cmd = true;
+ writel(readl(sspi->base + sspi->regs->spi_ctrl) |
+ (SIRFSOC_SPI_CMD_BYTE_NUM((t->len - 1)) |
+ SIRFSOC_SPI_CMD_MODE),
+ sspi->base + sspi->regs->spi_ctrl);
+ } else {
+ sspi->tx_by_cmd = false;
+ writel(readl(sspi->base + sspi->regs->spi_ctrl) &
+ ~SIRFSOC_SPI_CMD_MODE,
+ sspi->base + sspi->regs->spi_ctrl);
+ }
}
- /*
- * it should never set to hardware cs mode because in hardware cs mode,
- * cs signal can't controlled by driver.
- */
- regval |= SIRFSOC_SPI_CS_IO_MODE;
- writel(regval, sspi->base + SIRFSOC_SPI_CTRL);
-
if (IS_DMA_VALID(t)) {
/* Enable DMA mode for RX, TX */
- writel(0, sspi->base + SIRFSOC_SPI_TX_DMA_IO_CTRL);
+ writel(0, sspi->base + sspi->regs->tx_dma_io_ctrl);
writel(SIRFSOC_SPI_RX_DMA_FLUSH,
- sspi->base + SIRFSOC_SPI_RX_DMA_IO_CTRL);
+ sspi->base + sspi->regs->rx_dma_io_ctrl);
} else {
/* Enable IO mode for RX, TX */
writel(SIRFSOC_SPI_IO_MODE_SEL,
- sspi->base + SIRFSOC_SPI_TX_DMA_IO_CTRL);
+ sspi->base + sspi->regs->tx_dma_io_ctrl);
writel(SIRFSOC_SPI_IO_MODE_SEL,
- sspi->base + SIRFSOC_SPI_RX_DMA_IO_CTRL);
+ sspi->base + sspi->regs->rx_dma_io_ctrl);
}
-
return 0;
}
static int spi_sirfsoc_setup(struct spi_device *spi)
{
struct sirfsoc_spi *sspi;
+ int ret = 0;
sspi = spi_master_get_devdata(spi->master);
-
if (spi->cs_gpio == -ENOENT)
sspi->hw_cs = true;
- else
+ else {
sspi->hw_cs = false;
- return spi_sirfsoc_setup_transfer(spi, NULL);
+ if (!spi_get_ctldata(spi)) {
+ void *cs = kmalloc(sizeof(int), GFP_KERNEL);
+ if (!cs) {
+ ret = -ENOMEM;
+ goto exit;
+ }
+ ret = gpio_is_valid(spi->cs_gpio);
+ if (!ret) {
+ dev_err(&spi->dev, "no valid gpio\n");
+ ret = -ENOENT;
+ goto exit;
+ }
+ ret = gpio_request(spi->cs_gpio, DRIVER_NAME);
+ if (ret) {
+ dev_err(&spi->dev, "failed to request gpio\n");
+ goto exit;
+ }
+ spi_set_ctldata(spi, cs);
+ }
+ }
+ spi_sirfsoc_config_mode(spi);
+ spi_sirfsoc_chipselect(spi, BITBANG_CS_INACTIVE);
+exit:
+ return ret;
+}
+
+static void spi_sirfsoc_cleanup(struct spi_device *spi)
+{
+ if (spi_get_ctldata(spi)) {
+ gpio_free(spi->cs_gpio);
+ kfree(spi_get_ctldata(spi));
+ }
}
+static const struct sirf_spi_comp_data sirf_real_spi = {
+ .regs = &real_spi_register,
+ .type = SIRF_REAL_SPI,
+ .dat_max_frm_len = 64 * 1024,
+ .fifo_size = 256,
+};
+
+static const struct sirf_spi_comp_data sirf_usp_spi_p2 = {
+ .regs = &usp_spi_register,
+ .type = SIRF_USP_SPI_P2,
+ .dat_max_frm_len = 1024 * 1024,
+ .fifo_size = 128,
+ .hwinit = sirfsoc_usp_hwinit,
+};
+
+static const struct sirf_spi_comp_data sirf_usp_spi_a7 = {
+ .regs = &usp_spi_register,
+ .type = SIRF_USP_SPI_A7,
+ .dat_max_frm_len = 1024 * 1024,
+ .fifo_size = 512,
+ .hwinit = sirfsoc_usp_hwinit,
+};
+
+static const struct of_device_id spi_sirfsoc_of_match[] = {
+ { .compatible = "sirf,prima2-spi", .data = &sirf_real_spi},
+ { .compatible = "sirf,prima2-usp-spi", .data = &sirf_usp_spi_p2},
+ { .compatible = "sirf,atlas7-usp-spi", .data = &sirf_usp_spi_a7},
+ {}
+};
+MODULE_DEVICE_TABLE(of, spi_sirfsoc_of_match);
+
static int spi_sirfsoc_probe(struct platform_device *pdev)
{
struct sirfsoc_spi *sspi;
struct spi_master *master;
struct resource *mem_res;
+ struct sirf_spi_comp_data *spi_comp_data;
int irq;
- int i, ret;
+ int ret;
+ const struct of_device_id *match;
ret = device_reset(&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "Unable to allocate SPI master\n");
return -ENOMEM;
}
+ match = of_match_node(spi_sirfsoc_of_match, pdev->dev.of_node);
platform_set_drvdata(pdev, master);
sspi = spi_master_get_devdata(master);
-
+ sspi->fifo_full_offset = ilog2(sspi->fifo_size);
+ spi_comp_data = (struct sirf_spi_comp_data *)match->data;
+ sspi->regs = spi_comp_data->regs;
+ sspi->type = spi_comp_data->type;
+ sspi->fifo_level_chk_mask = (sspi->fifo_size / 4) - 1;
+ sspi->dat_max_frm_len = spi_comp_data->dat_max_frm_len;
+ sspi->fifo_size = spi_comp_data->fifo_size;
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sspi->base = devm_ioremap_resource(&pdev->dev, mem_res);
if (IS_ERR(sspi->base)) {
ret = PTR_ERR(sspi->base);
goto free_master;
}
-
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = -ENXIO;
sspi->bitbang.setup_transfer = spi_sirfsoc_setup_transfer;
sspi->bitbang.txrx_bufs = spi_sirfsoc_transfer;
sspi->bitbang.master->setup = spi_sirfsoc_setup;
+ sspi->bitbang.master->cleanup = spi_sirfsoc_cleanup;
master->bus_num = pdev->id;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH;
master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(12) |
SPI_BPW_MASK(16) | SPI_BPW_MASK(32);
master->max_speed_hz = SIRFSOC_SPI_DEFAULT_FRQ;
+ master->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX;
sspi->bitbang.master->dev.of_node = pdev->dev.of_node;
/* request DMA channels */
goto free_tx_dma;
}
clk_prepare_enable(sspi->clk);
+ if (spi_comp_data->hwinit)
+ spi_comp_data->hwinit(sspi);
sspi->ctrl_freq = clk_get_rate(sspi->clk);
init_completion(&sspi->rx_done);
init_completion(&sspi->tx_done);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- /* We are not using dummy delay between command and data */
- writel(0, sspi->base + SIRFSOC_SPI_DUMMY_DELAY_CTL);
-
- sspi->dummypage = kmalloc(2 * PAGE_SIZE, GFP_KERNEL);
- if (!sspi->dummypage) {
- ret = -ENOMEM;
- goto free_clk;
- }
-
ret = spi_bitbang_start(&sspi->bitbang);
if (ret)
- goto free_dummypage;
- for (i = 0; master->cs_gpios && i < master->num_chipselect; i++) {
- if (master->cs_gpios[i] == -ENOENT)
- continue;
- if (!gpio_is_valid(master->cs_gpios[i])) {
- dev_err(&pdev->dev, "no valid gpio\n");
- ret = -EINVAL;
- goto free_dummypage;
- }
- ret = devm_gpio_request(&pdev->dev,
- master->cs_gpios[i], DRIVER_NAME);
- if (ret) {
- dev_err(&pdev->dev, "failed to request gpio\n");
- goto free_dummypage;
- }
- }
+ goto free_clk;
dev_info(&pdev->dev, "registerred, bus number = %d\n", master->bus_num);
return 0;
-free_dummypage:
- kfree(sspi->dummypage);
free_clk:
clk_disable_unprepare(sspi->clk);
clk_put(sspi->clk);
master = platform_get_drvdata(pdev);
sspi = spi_master_get_devdata(master);
-
spi_bitbang_stop(&sspi->bitbang);
- kfree(sspi->dummypage);
clk_disable_unprepare(sspi->clk);
clk_put(sspi->clk);
dma_release_channel(sspi->rx_chan);
struct sirfsoc_spi *sspi = spi_master_get_devdata(master);
clk_enable(sspi->clk);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_RXFIFO_OP);
- writel(SIRFSOC_SPI_FIFO_START, sspi->base + SIRFSOC_SPI_TXFIFO_OP);
-
- return spi_master_resume(master);
+ writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op);
+ writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->rxfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->txfifo_op);
+ writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->rxfifo_op);
+ return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(spi_sirfsoc_pm_ops, spi_sirfsoc_suspend,
spi_sirfsoc_resume);
-static const struct of_device_id spi_sirfsoc_of_match[] = {
- { .compatible = "sirf,prima2-spi", },
- {}
-};
-MODULE_DEVICE_TABLE(of, spi_sirfsoc_of_match);
-
static struct platform_driver spi_sirfsoc_driver = {
.driver = {
.name = DRIVER_NAME,
MODULE_DESCRIPTION("SiRF SoC SPI master driver");
MODULE_AUTHOR("Zhiwu Song <Zhiwu.Song@csr.com>");
MODULE_AUTHOR("Barry Song <Baohua.Song@csr.com>");
+MODULE_AUTHOR("Qipan Li <Qipan.Li@csr.com>");
MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff