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Merge branch 'u-boot-tegra/master' into 'u-boot-arm/master'

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This commit is contained in:
Albert ARIBAUD
2013-03-26 10:40:13 +01:00
parent 412665b461 f789be6086
commit ebd749da69
28 changed files with 1188 additions and 491 deletions
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5
drivers/mtd/spi/winbond.c
View File

@@ -67,6 +67,11 @@ static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
.nr_blocks = 128,
.name = "W25Q80",
},
{
.id = 0x6016,
.nr_blocks = 512,
.name = "W25Q32DW",
},
{
.id = 0x6017,
.nr_blocks = 128,

6
drivers/spi/Makefile
View File

@@ -46,8 +46,10 @@ COBJS-$(CONFIG_OMAP3_SPI) += omap3_spi.o
COBJS-$(CONFIG_SOFT_SPI) += soft_spi.o
COBJS-$(CONFIG_SH_SPI) += sh_spi.o
COBJS-$(CONFIG_FSL_ESPI) += fsl_espi.o
COBJS-$(CONFIG_TEGRA_SPI) += tegra_spi.o
COBJS-$(CONFIG_TEGRA_SLINK) += tegra_slink.o
COBJS-$(CONFIG_FDT_SPI) += fdt_spi.o
COBJS-$(CONFIG_TEGRA20_SFLASH) += tegra20_sflash.o
COBJS-$(CONFIG_TEGRA20_SLINK) += tegra20_slink.o
COBJS-$(CONFIG_TEGRA114_SPI) += tegra114_spi.o
COBJS-$(CONFIG_XILINX_SPI) += xilinx_spi.o
COBJS := $(COBJS-y)

186
drivers/spi/fdt_spi.c Normal file
View File

@@ -0,0 +1,186 @@
/*
* Common fdt based SPI driver front end
*
* Copyright (c) 2013 NVIDIA Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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
*/
#include <common.h>
#include <malloc.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra20/tegra20_sflash.h>
#include <asm/arch-tegra20/tegra20_slink.h>
#include <asm/arch-tegra114/tegra114_spi.h>
#include <spi.h>
#include <fdtdec.h>
DECLARE_GLOBAL_DATA_PTR;
struct fdt_spi_driver {
int compat;
int max_ctrls;
int (*init)(int *node_list, int count);
int (*claim_bus)(struct spi_slave *slave);
int (*release_bus)(struct spi_slave *slave);
int (*cs_is_valid)(unsigned int bus, unsigned int cs);
struct spi_slave *(*setup_slave)(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode);
void (*free_slave)(struct spi_slave *slave);
void (*cs_activate)(struct spi_slave *slave);
void (*cs_deactivate)(struct spi_slave *slave);
int (*xfer)(struct spi_slave *slave, unsigned int bitlen,
const void *data_out, void *data_in, unsigned long flags);
};
static struct fdt_spi_driver fdt_spi_drivers[] = {
#ifdef CONFIG_TEGRA20_SFLASH
{
.compat = COMPAT_NVIDIA_TEGRA20_SFLASH,
.max_ctrls = 1,
.init = tegra20_spi_init,
.claim_bus = tegra20_spi_claim_bus,
.cs_is_valid = tegra20_spi_cs_is_valid,
.setup_slave = tegra20_spi_setup_slave,
.free_slave = tegra20_spi_free_slave,
.cs_activate = tegra20_spi_cs_activate,
.cs_deactivate = tegra20_spi_cs_deactivate,
.xfer = tegra20_spi_xfer,
},
#endif
#ifdef CONFIG_TEGRA20_SLINK
{
.compat = COMPAT_NVIDIA_TEGRA20_SLINK,
.max_ctrls = CONFIG_TEGRA_SLINK_CTRLS,
.init = tegra30_spi_init,
.claim_bus = tegra30_spi_claim_bus,
.cs_is_valid = tegra30_spi_cs_is_valid,
.setup_slave = tegra30_spi_setup_slave,
.free_slave = tegra30_spi_free_slave,
.cs_activate = tegra30_spi_cs_activate,
.cs_deactivate = tegra30_spi_cs_deactivate,
.xfer = tegra30_spi_xfer,
},
#endif
#ifdef CONFIG_TEGRA114_SPI
{
.compat = COMPAT_NVIDIA_TEGRA114_SPI,
.max_ctrls = CONFIG_TEGRA114_SPI_CTRLS,
.init = tegra114_spi_init,
.claim_bus = tegra114_spi_claim_bus,
.cs_is_valid = tegra114_spi_cs_is_valid,
.setup_slave = tegra114_spi_setup_slave,
.free_slave = tegra114_spi_free_slave,
.cs_activate = tegra114_spi_cs_activate,
.cs_deactivate = tegra114_spi_cs_deactivate,
.xfer = tegra114_spi_xfer,
},
#endif
};
static struct fdt_spi_driver *driver;
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
if (!driver)
return 0;
else if (!driver->cs_is_valid)
return 1;
else
return driver->cs_is_valid(bus, cs);
}
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
if (!driver || !driver->setup_slave)
return NULL;
return driver->setup_slave(bus, cs, max_hz, mode);
}
void spi_free_slave(struct spi_slave *slave)
{
if (driver && driver->free_slave)
return driver->free_slave(slave);
}
static int spi_init_driver(struct fdt_spi_driver *driver)
{
int count;
int node_list[driver->max_ctrls];
count = fdtdec_find_aliases_for_id(gd->fdt_blob, "spi",
driver->compat,
node_list,
driver->max_ctrls);
return driver->init(node_list, count);
}
void spi_init(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(fdt_spi_drivers); i++) {
driver = &fdt_spi_drivers[i];
if (!spi_init_driver(driver))
break;
}
if (i == ARRAY_SIZE(fdt_spi_drivers))
driver = NULL;
}
int spi_claim_bus(struct spi_slave *slave)
{
if (!driver)
return 1;
if (!driver->claim_bus)
return 0;
return driver->claim_bus(slave);
}
void spi_release_bus(struct spi_slave *slave)
{
if (driver && driver->release_bus)
driver->release_bus(slave);
}
void spi_cs_activate(struct spi_slave *slave)
{
if (driver && driver->cs_activate)
driver->cs_activate(slave);
}
void spi_cs_deactivate(struct spi_slave *slave)
{
if (driver && driver->cs_deactivate)
driver->cs_deactivate(slave);
}
int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
const void *data_out, void *data_in, unsigned long flags)
{
if (!driver || !driver->xfer)
return -1;
return driver->xfer(slave, bitlen, data_out, data_in, flags);
}

405
drivers/spi/tegra114_spi.c Normal file
View File

@@ -0,0 +1,405 @@
/*
* NVIDIA Tegra SPI controller (T114 and later)
*
* Copyright (c) 2010-2013 NVIDIA Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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
*/
#include <common.h>
#include <malloc.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra114/tegra114_spi.h>
#include <spi.h>
#include <fdtdec.h>
DECLARE_GLOBAL_DATA_PTR;
/* COMMAND1 */
#define SPI_CMD1_GO (1 << 31)
#define SPI_CMD1_M_S (1 << 30)
#define SPI_CMD1_MODE_MASK 0x3
#define SPI_CMD1_MODE_SHIFT 28
#define SPI_CMD1_CS_SEL_MASK 0x3
#define SPI_CMD1_CS_SEL_SHIFT 26
#define SPI_CMD1_CS_POL_INACTIVE3 (1 << 25)
#define SPI_CMD1_CS_POL_INACTIVE2 (1 << 24)
#define SPI_CMD1_CS_POL_INACTIVE1 (1 << 23)
#define SPI_CMD1_CS_POL_INACTIVE0 (1 << 22)
#define SPI_CMD1_CS_SW_HW (1 << 21)
#define SPI_CMD1_CS_SW_VAL (1 << 20)
#define SPI_CMD1_IDLE_SDA_MASK 0x3
#define SPI_CMD1_IDLE_SDA_SHIFT 18
#define SPI_CMD1_BIDIR (1 << 17)
#define SPI_CMD1_LSBI_FE (1 << 16)
#define SPI_CMD1_LSBY_FE (1 << 15)
#define SPI_CMD1_BOTH_EN_BIT (1 << 14)
#define SPI_CMD1_BOTH_EN_BYTE (1 << 13)
#define SPI_CMD1_RX_EN (1 << 12)
#define SPI_CMD1_TX_EN (1 << 11)
#define SPI_CMD1_PACKED (1 << 5)
#define SPI_CMD1_BIT_LEN_MASK 0x1F
#define SPI_CMD1_BIT_LEN_SHIFT 0
/* COMMAND2 */
#define SPI_CMD2_TX_CLK_TAP_DELAY (1 << 6)
#define SPI_CMD2_TX_CLK_TAP_DELAY_MASK (0x3F << 6)
#define SPI_CMD2_RX_CLK_TAP_DELAY (1 << 0)
#define SPI_CMD2_RX_CLK_TAP_DELAY_MASK (0x3F << 0)
/* TRANSFER STATUS */
#define SPI_XFER_STS_RDY (1 << 30)
/* FIFO STATUS */
#define SPI_FIFO_STS_CS_INACTIVE (1 << 31)
#define SPI_FIFO_STS_FRAME_END (1 << 30)
#define SPI_FIFO_STS_RX_FIFO_FLUSH (1 << 15)
#define SPI_FIFO_STS_TX_FIFO_FLUSH (1 << 14)
#define SPI_FIFO_STS_ERR (1 << 8)
#define SPI_FIFO_STS_TX_FIFO_OVF (1 << 7)
#define SPI_FIFO_STS_TX_FIFO_UNR (1 << 6)
#define SPI_FIFO_STS_RX_FIFO_OVF (1 << 5)
#define SPI_FIFO_STS_RX_FIFO_UNR (1 << 4)
#define SPI_FIFO_STS_TX_FIFO_FULL (1 << 3)
#define SPI_FIFO_STS_TX_FIFO_EMPTY (1 << 2)
#define SPI_FIFO_STS_RX_FIFO_FULL (1 << 1)
#define SPI_FIFO_STS_RX_FIFO_EMPTY (1 << 0)
#define SPI_TIMEOUT 1000
#define TEGRA_SPI_MAX_FREQ 52000000
struct spi_regs {
u32 command1; /* 000:SPI_COMMAND1 register */
u32 command2; /* 004:SPI_COMMAND2 register */
u32 timing1; /* 008:SPI_CS_TIM1 register */
u32 timing2; /* 00c:SPI_CS_TIM2 register */
u32 xfer_status;/* 010:SPI_TRANS_STATUS register */
u32 fifo_status;/* 014:SPI_FIFO_STATUS register */
u32 tx_data; /* 018:SPI_TX_DATA register */
u32 rx_data; /* 01c:SPI_RX_DATA register */
u32 dma_ctl; /* 020:SPI_DMA_CTL register */
u32 dma_blk; /* 024:SPI_DMA_BLK register */
u32 rsvd[56]; /* 028-107 reserved */
u32 tx_fifo; /* 108:SPI_FIFO1 register */
u32 rsvd2[31]; /* 10c-187 reserved */
u32 rx_fifo; /* 188:SPI_FIFO2 register */
u32 spare_ctl; /* 18c:SPI_SPARE_CTRL register */
};
struct tegra_spi_ctrl {
struct spi_regs *regs;
unsigned int freq;
unsigned int mode;
int periph_id;
int valid;
};
struct tegra_spi_slave {
struct spi_slave slave;
struct tegra_spi_ctrl *ctrl;
};
static struct tegra_spi_ctrl spi_ctrls[CONFIG_TEGRA114_SPI_CTRLS];
static inline struct tegra_spi_slave *to_tegra_spi(struct spi_slave *slave)
{
return container_of(slave, struct tegra_spi_slave, slave);
}
int tegra114_spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
if (bus >= CONFIG_TEGRA114_SPI_CTRLS || cs > 3 || !spi_ctrls[bus].valid)
return 0;
else
return 1;
}
struct spi_slave *tegra114_spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
struct tegra_spi_slave *spi;
debug("%s: bus: %u, cs: %u, max_hz: %u, mode: %u\n", __func__,
bus, cs, max_hz, mode);
if (!spi_cs_is_valid(bus, cs)) {
printf("SPI error: unsupported bus %d / chip select %d\n",
bus, cs);
return NULL;
}
if (max_hz > TEGRA_SPI_MAX_FREQ) {
printf("SPI error: unsupported frequency %d Hz. Max frequency"
" is %d Hz\n", max_hz, TEGRA_SPI_MAX_FREQ);
return NULL;
}
spi = malloc(sizeof(struct tegra_spi_slave));
if (!spi) {
printf("SPI error: malloc of SPI structure failed\n");
return NULL;
}
spi->slave.bus = bus;
spi->slave.cs = cs;
spi->ctrl = &spi_ctrls[bus];
if (!spi->ctrl) {
printf("SPI error: could not find controller for bus %d\n",
bus);
return NULL;
}
if (max_hz < spi->ctrl->freq) {
debug("%s: limiting frequency from %u to %u\n", __func__,
spi->ctrl->freq, max_hz);
spi->ctrl->freq = max_hz;
}
spi->ctrl->mode = mode;
return &spi->slave;
}
void tegra114_spi_free_slave(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
free(spi);
}
int tegra114_spi_init(int *node_list, int count)
{
struct tegra_spi_ctrl *ctrl;
int i;
int node = 0;
int found = 0;
for (i = 0; i < count; i++) {
ctrl = &spi_ctrls[i];
node = node_list[i];
ctrl->regs = (struct spi_regs *)fdtdec_get_addr(gd->fdt_blob,
node, "reg");
if ((fdt_addr_t)ctrl->regs == FDT_ADDR_T_NONE) {
debug("%s: no spi register found\n", __func__);
continue;
}
ctrl->freq = fdtdec_get_int(gd->fdt_blob, node,
"spi-max-frequency", 0);
if (!ctrl->freq) {
debug("%s: no spi max frequency found\n", __func__);
continue;
}
ctrl->periph_id = clock_decode_periph_id(gd->fdt_blob, node);
if (ctrl->periph_id == PERIPH_ID_NONE) {
debug("%s: could not decode periph id\n", __func__);
continue;
}
ctrl->valid = 1;
found = 1;
debug("%s: found controller at %p, freq = %u, periph_id = %d\n",
__func__, ctrl->regs, ctrl->freq, ctrl->periph_id);
}
return !found;
}
int tegra114_spi_claim_bus(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct spi_regs *regs = spi->ctrl->regs;
/* Change SPI clock to correct frequency, PLLP_OUT0 source */
clock_start_periph_pll(spi->ctrl->periph_id, CLOCK_ID_PERIPH,
spi->ctrl->freq);
/* Clear stale status here */
setbits_le32(&regs->fifo_status,
SPI_FIFO_STS_ERR |
SPI_FIFO_STS_TX_FIFO_OVF |
SPI_FIFO_STS_TX_FIFO_UNR |
SPI_FIFO_STS_RX_FIFO_OVF |
SPI_FIFO_STS_RX_FIFO_UNR |
SPI_FIFO_STS_TX_FIFO_FULL |
SPI_FIFO_STS_TX_FIFO_EMPTY |
SPI_FIFO_STS_RX_FIFO_FULL |
SPI_FIFO_STS_RX_FIFO_EMPTY);
debug("%s: FIFO STATUS = %08x\n", __func__, readl(&regs->fifo_status));
/* Set master mode and sw controlled CS */
setbits_le32(&regs->command1, SPI_CMD1_M_S | SPI_CMD1_CS_SW_HW |
(spi->ctrl->mode << SPI_CMD1_MODE_SHIFT));
debug("%s: COMMAND1 = %08x\n", __func__, readl(&regs->command1));
return 0;
}
void tegra114_spi_cs_activate(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct spi_regs *regs = spi->ctrl->regs;
clrbits_le32(&regs->command1, SPI_CMD1_CS_SW_VAL);
}
void tegra114_spi_cs_deactivate(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct spi_regs *regs = spi->ctrl->regs;
setbits_le32(&regs->command1, SPI_CMD1_CS_SW_VAL);
}
int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
const void *data_out, void *data_in, unsigned long flags)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct spi_regs *regs = spi->ctrl->regs;
u32 reg, tmpdout, tmpdin = 0;
const u8 *dout = data_out;
u8 *din = data_in;
int num_bytes;
int ret;
debug("%s: slave %u:%u dout %p din %p bitlen %u\n",
__func__, slave->bus, slave->cs, dout, din, bitlen);
if (bitlen % 8)
return -1;
num_bytes = bitlen / 8;
ret = 0;
/* clear all error status bits */
reg = readl(&regs->fifo_status);
writel(reg, &regs->fifo_status);
/* clear ready bit */
setbits_le32(&regs->xfer_status, SPI_XFER_STS_RDY);
clrsetbits_le32(&regs->command1, SPI_CMD1_CS_SW_VAL,
SPI_CMD1_RX_EN | SPI_CMD1_TX_EN | SPI_CMD1_LSBY_FE |
(slave->cs << SPI_CMD1_CS_SEL_SHIFT));
/* set xfer size to 1 block (32 bits) */
writel(0, &regs->dma_blk);
if (flags & SPI_XFER_BEGIN)
spi_cs_activate(slave);
/* handle data in 32-bit chunks */
while (num_bytes > 0) {
int bytes;
int is_read = 0;
int tm, i;
tmpdout = 0;
bytes = (num_bytes > 4) ? 4 : num_bytes;
if (dout != NULL) {
for (i = 0; i < bytes; ++i)
tmpdout = (tmpdout << 8) | dout[i];
dout += bytes;
}
num_bytes -= bytes;
clrsetbits_le32(&regs->command1,
SPI_CMD1_BIT_LEN_MASK << SPI_CMD1_BIT_LEN_SHIFT,
(bytes * 8 - 1) << SPI_CMD1_BIT_LEN_SHIFT);
writel(tmpdout, &regs->tx_fifo);
setbits_le32(&regs->command1, SPI_CMD1_GO);
/*
* Wait for SPI transmit FIFO to empty, or to time out.
* The RX FIFO status will be read and cleared last
*/
for (tm = 0, is_read = 0; tm < SPI_TIMEOUT; ++tm) {
u32 fifo_status, xfer_status;
fifo_status = readl(&regs->fifo_status);
/* We can exit when we've had both RX and TX activity */
if (is_read &&
(fifo_status & SPI_FIFO_STS_TX_FIFO_EMPTY))
break;
xfer_status = readl(&regs->xfer_status);
if (!(xfer_status & SPI_XFER_STS_RDY))
continue;
if (fifo_status & SPI_FIFO_STS_ERR) {
debug("%s: got a fifo error: ", __func__);
if (fifo_status & SPI_FIFO_STS_TX_FIFO_OVF)
debug("tx FIFO overflow ");
if (fifo_status & SPI_FIFO_STS_TX_FIFO_UNR)
debug("tx FIFO underrun ");
if (fifo_status & SPI_FIFO_STS_RX_FIFO_OVF)
debug("rx FIFO overflow ");
if (fifo_status & SPI_FIFO_STS_RX_FIFO_UNR)
debug("rx FIFO underrun ");
if (fifo_status & SPI_FIFO_STS_TX_FIFO_FULL)
debug("tx FIFO full ");
if (fifo_status & SPI_FIFO_STS_TX_FIFO_EMPTY)
debug("tx FIFO empty ");
if (fifo_status & SPI_FIFO_STS_RX_FIFO_FULL)
debug("rx FIFO full ");
if (fifo_status & SPI_FIFO_STS_RX_FIFO_EMPTY)
debug("rx FIFO empty ");
debug("\n");
break;
}
if (!(fifo_status & SPI_FIFO_STS_RX_FIFO_EMPTY)) {
tmpdin = readl(&regs->rx_fifo);
is_read = 1;
/* swap bytes read in */
if (din != NULL) {
for (i = bytes - 1; i >= 0; --i) {
din[i] = tmpdin & 0xff;
tmpdin >>= 8;
}
din += bytes;
}
}
}
if (tm >= SPI_TIMEOUT)
ret = tm;
/* clear ACK RDY, etc. bits */
writel(readl(&regs->fifo_status), &regs->fifo_status);
}
if (flags & SPI_XFER_END)
spi_cs_deactivate(slave);
debug("%s: transfer ended. Value=%08x, fifo_status = %08x\n",
__func__, tmpdin, readl(&regs->fifo_status));
if (ret) {
printf("%s: timeout during SPI transfer, tm %d\n",
__func__, ret);
return -1;
}
return 0;
}

215
drivers/spi/tegra_spi.c → drivers/spi/tegra20_sflash.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2010-2012 NVIDIA Corporation
* Copyright (c) 2010-2013 NVIDIA Corporation
* With help from the mpc8xxx SPI driver
* With more help from omap3_spi SPI driver
*
@@ -28,34 +28,80 @@
#include <asm/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/uart-spi-switch.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/tegra_spi.h>
#include <asm/arch-tegra20/tegra20_sflash.h>
#include <spi.h>
#include <fdtdec.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_SPI_CORRUPTS_UART)
#define corrupt_delay() udelay(CONFIG_SPI_CORRUPTS_UART_DLY);
#else
#define corrupt_delay()
#endif
#define SPI_CMD_GO (1 << 30)
#define SPI_CMD_ACTIVE_SCLK_SHIFT 26
#define SPI_CMD_ACTIVE_SCLK_MASK (3 << SPI_CMD_ACTIVE_SCLK_SHIFT)
#define SPI_CMD_CK_SDA (1 << 21)
#define SPI_CMD_ACTIVE_SDA_SHIFT 18
#define SPI_CMD_ACTIVE_SDA_MASK (3 << SPI_CMD_ACTIVE_SDA_SHIFT)
#define SPI_CMD_CS_POL (1 << 16)
#define SPI_CMD_TXEN (1 << 15)
#define SPI_CMD_RXEN (1 << 14)
#define SPI_CMD_CS_VAL (1 << 13)
#define SPI_CMD_CS_SOFT (1 << 12)
#define SPI_CMD_CS_DELAY (1 << 9)
#define SPI_CMD_CS3_EN (1 << 8)
#define SPI_CMD_CS2_EN (1 << 7)
#define SPI_CMD_CS1_EN (1 << 6)
#define SPI_CMD_CS0_EN (1 << 5)
#define SPI_CMD_BIT_LENGTH (1 << 4)
#define SPI_CMD_BIT_LENGTH_MASK 0x0000001F
struct tegra_spi_slave {
struct spi_slave slave;
struct spi_tegra *regs;
#define SPI_STAT_BSY (1 << 31)
#define SPI_STAT_RDY (1 << 30)
#define SPI_STAT_RXF_FLUSH (1 << 29)
#define SPI_STAT_TXF_FLUSH (1 << 28)
#define SPI_STAT_RXF_UNR (1 << 27)
#define SPI_STAT_TXF_OVF (1 << 26)
#define SPI_STAT_RXF_EMPTY (1 << 25)
#define SPI_STAT_RXF_FULL (1 << 24)
#define SPI_STAT_TXF_EMPTY (1 << 23)
#define SPI_STAT_TXF_FULL (1 << 22)
#define SPI_STAT_SEL_TXRX_N (1 << 16)
#define SPI_STAT_CUR_BLKCNT (1 << 15)
#define SPI_TIMEOUT 1000
#define TEGRA_SPI_MAX_FREQ 52000000
struct spi_regs {
u32 command; /* SPI_COMMAND_0 register */
u32 status; /* SPI_STATUS_0 register */
u32 rx_cmp; /* SPI_RX_CMP_0 register */
u32 dma_ctl; /* SPI_DMA_CTL_0 register */
u32 tx_fifo; /* SPI_TX_FIFO_0 register */
u32 rsvd[3]; /* offsets 0x14 to 0x1F reserved */
u32 rx_fifo; /* SPI_RX_FIFO_0 register */
};
struct tegra_spi_ctrl {
struct spi_regs *regs;
unsigned int freq;
unsigned int mode;
int periph_id;
int valid;
};
struct tegra_spi_slave {
struct spi_slave slave;
struct tegra_spi_ctrl *ctrl;
};
/* tegra20 only supports one SFLASH controller */
static struct tegra_spi_ctrl spi_ctrls[1];
static inline struct tegra_spi_slave *to_tegra_spi(struct spi_slave *slave)
{
return container_of(slave, struct tegra_spi_slave, slave);
}
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
int tegra20_spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
/* Tegra20 SPI-Flash - only 1 device ('bus/cs') */
if (bus != 0 || cs != 0)
@@ -64,8 +110,8 @@ int spi_cs_is_valid(unsigned int bus, unsigned int cs)
return 1;
}
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
struct spi_slave *tegra20_spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
struct tegra_spi_slave *spi;
@@ -88,86 +134,93 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
}
spi->slave.bus = bus;
spi->slave.cs = cs;
#ifdef CONFIG_OF_CONTROL
int node = fdtdec_next_compatible(gd->fdt_blob, 0,
COMPAT_NVIDIA_TEGRA20_SFLASH);
if (node < 0) {
debug("%s: cannot locate sflash node\n", __func__);
spi->ctrl = &spi_ctrls[bus];
if (!spi->ctrl) {
printf("SPI error: could not find controller for bus %d\n",
bus);
return NULL;
}
if (!fdtdec_get_is_enabled(gd->fdt_blob, node)) {
debug("%s: sflash is disabled\n", __func__);
return NULL;
}
spi->regs = (struct spi_tegra *)fdtdec_get_addr(gd->fdt_blob,
node, "reg");
if ((fdt_addr_t)spi->regs == FDT_ADDR_T_NONE) {
debug("%s: no sflash register found\n", __func__);
return NULL;
}
spi->freq = fdtdec_get_int(gd->fdt_blob, node, "spi-max-frequency", 0);
if (!spi->freq) {
debug("%s: no sflash max frequency found\n", __func__);
return NULL;
}
spi->periph_id = clock_decode_periph_id(gd->fdt_blob, node);
if (spi->periph_id == PERIPH_ID_NONE) {
debug("%s: could not decode periph id\n", __func__);
return NULL;
}
#else
spi->regs = (struct spi_tegra *)NV_PA_SPI_BASE;
spi->freq = TEGRA_SPI_MAX_FREQ;
spi->periph_id = PERIPH_ID_SPI1;
#endif
if (max_hz < spi->freq) {
if (max_hz < spi->ctrl->freq) {
debug("%s: limiting frequency from %u to %u\n", __func__,
spi->freq, max_hz);
spi->freq = max_hz;
spi->ctrl->freq, max_hz);
spi->ctrl->freq = max_hz;
}
debug("%s: controller initialized at %p, freq = %u, periph_id = %d\n",
__func__, spi->regs, spi->freq, spi->periph_id);
spi->mode = mode;
spi->ctrl->mode = mode;
return &spi->slave;
}
void spi_free_slave(struct spi_slave *slave)
void tegra20_spi_free_slave(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
free(spi);
}
void spi_init(void)
int tegra20_spi_init(int *node_list, int count)
{
/* do nothing */
struct tegra_spi_ctrl *ctrl;
int i;
int node = 0;
int found = 0;
for (i = 0; i < count; i++) {
ctrl = &spi_ctrls[i];
node = node_list[i];
ctrl->regs = (struct spi_regs *)fdtdec_get_addr(gd->fdt_blob,
node, "reg");
if ((fdt_addr_t)ctrl->regs == FDT_ADDR_T_NONE) {
debug("%s: no slink register found\n", __func__);
continue;
}
ctrl->freq = fdtdec_get_int(gd->fdt_blob, node,
"spi-max-frequency", 0);
if (!ctrl->freq) {
debug("%s: no slink max frequency found\n", __func__);
continue;
}
ctrl->periph_id = clock_decode_periph_id(gd->fdt_blob, node);
if (ctrl->periph_id == PERIPH_ID_NONE) {
debug("%s: could not decode periph id\n", __func__);
continue;
}
ctrl->valid = 1;
found = 1;
debug("%s: found controller at %p, freq = %u, periph_id = %d\n",
__func__, ctrl->regs, ctrl->freq, ctrl->periph_id);
}
return !found;
}
int spi_claim_bus(struct spi_slave *slave)
int tegra20_spi_claim_bus(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct spi_tegra *regs = spi->regs;
struct spi_regs *regs = spi->ctrl->regs;
u32 reg;
/* Change SPI clock to correct frequency, PLLP_OUT0 source */
clock_start_periph_pll(spi->periph_id, CLOCK_ID_PERIPH, spi->freq);
clock_start_periph_pll(spi->ctrl->periph_id, CLOCK_ID_PERIPH,
spi->ctrl->freq);
/* Clear stale status here */
reg = SPI_STAT_RDY | SPI_STAT_RXF_FLUSH | SPI_STAT_TXF_FLUSH | \
SPI_STAT_RXF_UNR | SPI_STAT_TXF_OVF;
writel(reg, &regs->status);
debug("spi_init: STATUS = %08x\n", readl(&regs->status));
debug("%s: STATUS = %08x\n", __func__, readl(&regs->status));
/*
* Use sw-controlled CS, so we can clock in data after ReadID, etc.
*/
reg = (spi->mode & 1) << SPI_CMD_ACTIVE_SDA_SHIFT;
if (spi->mode & 2)
reg = (spi->ctrl->mode & 1) << SPI_CMD_ACTIVE_SDA_SHIFT;
if (spi->ctrl->mode & 2)
reg |= 1 << SPI_CMD_ACTIVE_SCLK_SHIFT;
clrsetbits_le32(&regs->command, SPI_CMD_ACTIVE_SCLK_MASK |
SPI_CMD_ACTIVE_SDA_MASK, SPI_CMD_CS_SOFT | reg);
debug("spi_init: COMMAND = %08x\n", readl(&regs->command));
debug("%s: COMMAND = %08x\n", __func__, readl(&regs->command));
/*
* SPI pins on Tegra20 are muxed - change pinmux later due to UART
@@ -175,58 +228,34 @@ int spi_claim_bus(struct spi_slave *slave)
*/
pinmux_set_func(PINGRP_GMD, PMUX_FUNC_SFLASH);
pinmux_tristate_disable(PINGRP_LSPI);
pinmux_set_func(PINGRP_GMC, PMUX_FUNC_SFLASH);
#ifndef CONFIG_SPI_UART_SWITCH
/*
* NOTE:
* Only set PinMux bits 3:2 to SPI here on boards that don't have the
* SPI UART switch or subsequent UART data won't go out! See
* spi_uart_switch().
*/
/* TODO: pinmux_set_func(PINGRP_GMC, PMUX_FUNC_SFLASH); */
#endif
return 0;
}
void spi_release_bus(struct spi_slave *slave)
{
/*
* We can't release UART_DISABLE and set pinmux to UART4 here since
* some code (e,g, spi_flash_probe) uses printf() while the SPI
* bus is held. That is arguably bad, but it has the advantage of
* already being in the source tree.
*/
}
void spi_cs_activate(struct spi_slave *slave)
void tegra20_spi_cs_activate(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
pinmux_select_spi();
struct spi_regs *regs = spi->ctrl->regs;
/* CS is negated on Tegra, so drive a 1 to get a 0 */
setbits_le32(&spi->regs->command, SPI_CMD_CS_VAL);
corrupt_delay(); /* Let UART settle */
setbits_le32(&regs->command, SPI_CMD_CS_VAL);
}
void spi_cs_deactivate(struct spi_slave *slave)
void tegra20_spi_cs_deactivate(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
pinmux_select_uart();
struct spi_regs *regs = spi->ctrl->regs;
/* CS is negated on Tegra, so drive a 0 to get a 1 */
clrbits_le32(&spi->regs->command, SPI_CMD_CS_VAL);
corrupt_delay(); /* Let SPI settle */
clrbits_le32(&regs->command, SPI_CMD_CS_VAL);
}
int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
int tegra20_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
const void *data_out, void *data_in, unsigned long flags)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct spi_tegra *regs = spi->regs;
struct spi_regs *regs = spi->ctrl->regs;
u32 reg, tmpdout, tmpdin = 0;
const u8 *dout = data_out;
u8 *din = data_in;

128
drivers/spi/tegra_slink.c → drivers/spi/tegra20_slink.c
View File

@@ -27,14 +27,68 @@
#include <asm/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/tegra_slink.h>
#include <asm/arch-tegra20/tegra20_slink.h>
#include <spi.h>
#include <fdtdec.h>
DECLARE_GLOBAL_DATA_PTR;
/* COMMAND */
#define SLINK_CMD_ENB (1 << 31)
#define SLINK_CMD_GO (1 << 30)
#define SLINK_CMD_M_S (1 << 28)
#define SLINK_CMD_CK_SDA (1 << 21)
#define SLINK_CMD_CS_POL (1 << 13)
#define SLINK_CMD_CS_VAL (1 << 12)
#define SLINK_CMD_CS_SOFT (1 << 11)
#define SLINK_CMD_BIT_LENGTH (1 << 4)
#define SLINK_CMD_BIT_LENGTH_MASK 0x0000001F
/* COMMAND2 */
#define SLINK_CMD2_TXEN (1 << 30)
#define SLINK_CMD2_RXEN (1 << 31)
#define SLINK_CMD2_SS_EN (1 << 18)
#define SLINK_CMD2_SS_EN_SHIFT 18
#define SLINK_CMD2_SS_EN_MASK 0x000C0000
#define SLINK_CMD2_CS_ACTIVE_BETWEEN (1 << 17)
/* STATUS */
#define SLINK_STAT_BSY (1 << 31)
#define SLINK_STAT_RDY (1 << 30)
#define SLINK_STAT_ERR (1 << 29)
#define SLINK_STAT_RXF_FLUSH (1 << 27)
#define SLINK_STAT_TXF_FLUSH (1 << 26)
#define SLINK_STAT_RXF_OVF (1 << 25)
#define SLINK_STAT_TXF_UNR (1 << 24)
#define SLINK_STAT_RXF_EMPTY (1 << 23)
#define SLINK_STAT_RXF_FULL (1 << 22)
#define SLINK_STAT_TXF_EMPTY (1 << 21)
#define SLINK_STAT_TXF_FULL (1 << 20)
#define SLINK_STAT_TXF_OVF (1 << 19)
#define SLINK_STAT_RXF_UNR (1 << 18)
#define SLINK_STAT_CUR_BLKCNT (1 << 15)
/* STATUS2 */
#define SLINK_STAT2_RXF_FULL_CNT (1 << 16)
#define SLINK_STAT2_TXF_FULL_CNT (1 << 0)
#define SPI_TIMEOUT 1000
#define TEGRA_SPI_MAX_FREQ 52000000
struct spi_regs {
u32 command; /* SLINK_COMMAND_0 register */
u32 command2; /* SLINK_COMMAND2_0 reg */
u32 status; /* SLINK_STATUS_0 register */
u32 reserved; /* Reserved offset 0C */
u32 mas_data; /* SLINK_MAS_DATA_0 reg */
u32 slav_data; /* SLINK_SLAVE_DATA_0 reg */
u32 dma_ctl; /* SLINK_DMA_CTL_0 register */
u32 status2; /* SLINK_STATUS2_0 reg */
u32 rsvd[56]; /* 0x20 to 0xFF reserved */
u32 tx_fifo; /* SLINK_TX_FIFO_0 reg off 100h */
u32 rsvd2[31]; /* 0x104 to 0x17F reserved */
u32 rx_fifo; /* SLINK_RX_FIFO_0 reg off 180h */
};
struct tegra_spi_ctrl {
struct slink_tegra *regs;
struct spi_regs *regs;
unsigned int freq;
unsigned int mode;
int periph_id;
@@ -53,7 +107,7 @@ static inline struct tegra_spi_slave *to_tegra_spi(struct spi_slave *slave)
return container_of(slave, struct tegra_spi_slave, slave);
}
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
int tegra30_spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
if (bus >= CONFIG_TEGRA_SLINK_CTRLS || cs > 3 || !spi_ctrls[bus].valid)
return 0;
@@ -61,7 +115,7 @@ int spi_cs_is_valid(unsigned int bus, unsigned int cs)
return 1;
}
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
struct spi_slave *tegra30_spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
struct tegra_spi_slave *spi;
@@ -105,32 +159,26 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
return &spi->slave;
}
void spi_free_slave(struct spi_slave *slave)
void tegra30_spi_free_slave(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
free(spi);
}
void spi_init(void)
int tegra30_spi_init(int *node_list, int count)
{
struct tegra_spi_ctrl *ctrl;
int i;
#ifdef CONFIG_OF_CONTROL
int node = 0;
int count;
int node_list[CONFIG_TEGRA_SLINK_CTRLS];
int found = 0;
count = fdtdec_find_aliases_for_id(gd->fdt_blob, "spi",
COMPAT_NVIDIA_TEGRA20_SLINK,
node_list,
CONFIG_TEGRA_SLINK_CTRLS);
for (i = 0; i < count; i++) {
ctrl = &spi_ctrls[i];
node = node_list[i];
ctrl->regs = (struct slink_tegra *)fdtdec_get_addr(gd->fdt_blob,
node, "reg");
ctrl->regs = (struct spi_regs *)fdtdec_get_addr(gd->fdt_blob,
node, "reg");
if ((fdt_addr_t)ctrl->regs == FDT_ADDR_T_NONE) {
debug("%s: no slink register found\n", __func__);
continue;
@@ -148,44 +196,18 @@ void spi_init(void)
continue;
}
ctrl->valid = 1;
found = 1;
debug("%s: found controller at %p, freq = %u, periph_id = %d\n",
__func__, ctrl->regs, ctrl->freq, ctrl->periph_id);
}
#else
for (i = 0; i < CONFIG_TEGRA_SLINK_CTRLS; i++) {
ctrl = &spi_ctrls[i];
u32 base_regs[] = {
NV_PA_SLINK1_BASE,
NV_PA_SLINK2_BASE,
NV_PA_SLINK3_BASE,
NV_PA_SLINK4_BASE,
NV_PA_SLINK5_BASE,
NV_PA_SLINK6_BASE,
};
int periph_ids[] = {
PERIPH_ID_SBC1,
PERIPH_ID_SBC2,
PERIPH_ID_SBC3,
PERIPH_ID_SBC4,
PERIPH_ID_SBC5,
PERIPH_ID_SBC6,
};
ctrl->regs = (struct slink_tegra *)base_regs[i];
ctrl->freq = TEGRA_SPI_MAX_FREQ;
ctrl->periph_id = periph_ids[i];
ctrl->valid = 1;
debug("%s: found controller at %p, freq = %u, periph_id = %d\n",
__func__, ctrl->regs, ctrl->freq, ctrl->periph_id);
}
#endif
return !found;
}
int spi_claim_bus(struct spi_slave *slave)
int tegra30_spi_claim_bus(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct slink_tegra *regs = spi->ctrl->regs;
struct spi_regs *regs = spi->ctrl->regs;
u32 reg;
/* Change SPI clock to correct frequency, PLLP_OUT0 source */
@@ -207,33 +229,29 @@ int spi_claim_bus(struct spi_slave *slave)
return 0;
}
void spi_release_bus(struct spi_slave *slave)
{
}
void spi_cs_activate(struct spi_slave *slave)
void tegra30_spi_cs_activate(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct slink_tegra *regs = spi->ctrl->regs;
struct spi_regs *regs = spi->ctrl->regs;
/* CS is negated on Tegra, so drive a 1 to get a 0 */
setbits_le32(&regs->command, SLINK_CMD_CS_VAL);
}
void spi_cs_deactivate(struct spi_slave *slave)
void tegra30_spi_cs_deactivate(struct spi_slave *slave)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct slink_tegra *regs = spi->ctrl->regs;
struct spi_regs *regs = spi->ctrl->regs;
/* CS is negated on Tegra, so drive a 0 to get a 1 */
clrbits_le32(&regs->command, SLINK_CMD_CS_VAL);
}
int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
int tegra30_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
const void *data_out, void *data_in, unsigned long flags)
{
struct tegra_spi_slave *spi = to_tegra_spi(slave);
struct slink_tegra *regs = spi->ctrl->regs;
struct spi_regs *regs = spi->ctrl->regs;
u32 reg, tmpdout, tmpdin = 0;
const u8 *dout = data_out;
u8 *din = data_in;