diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/fpga/spartan3.c | 6 | ||||
| -rw-r--r-- | drivers/net/davinci_emac.c | 41 | ||||
| -rw-r--r-- | drivers/power/twl6030.c | 124 | ||||
| -rw-r--r-- | drivers/serial/serial_pl01x.c | 50 | ||||
| -rw-r--r-- | drivers/serial/serial_pl01x.h | 41 | ||||
| -rw-r--r-- | drivers/spi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/spi/omap3_spi.c | 352 | ||||
| -rw-r--r-- | drivers/spi/omap3_spi.h | 117 |
8 files changed, 690 insertions, 42 deletions
diff --git a/drivers/fpga/spartan3.c b/drivers/fpga/spartan3.c index 7a89b5692c..1dd6f26f98 100644 --- a/drivers/fpga/spartan3.c +++ b/drivers/fpga/spartan3.c @@ -366,6 +366,8 @@ static int Spartan3_ss_load (Xilinx_desc * desc, void *buf, size_t bsize) CONFIG_FPGA_DELAY (); if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */ puts ("** Timeout waiting for INIT to start.\n"); + if (*fn->abort) + (*fn->abort) (cookie); return FPGA_FAIL; } } while (!(*fn->init) (cookie)); @@ -380,6 +382,8 @@ static int Spartan3_ss_load (Xilinx_desc * desc, void *buf, size_t bsize) CONFIG_FPGA_DELAY (); if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) { /* check the time */ puts ("** Timeout waiting for INIT to clear.\n"); + if (*fn->abort) + (*fn->abort) (cookie); return FPGA_FAIL; } } while ((*fn->init) (cookie)); @@ -394,6 +398,8 @@ static int Spartan3_ss_load (Xilinx_desc * desc, void *buf, size_t bsize) while DONE is low (inactive) */ if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) { puts ("** CRC error during FPGA load.\n"); + if (*fn->abort) + (*fn->abort) (cookie); return (FPGA_FAIL); } val = data [bytecount ++]; diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c index e06896fea7..43a3d79dc5 100644 --- a/drivers/net/davinci_emac.c +++ b/drivers/net/davinci_emac.c @@ -243,8 +243,35 @@ static int gen_get_link_speed(int phy_addr) { u_int16_t tmp; - if (davinci_eth_phy_read(phy_addr, MII_STATUS_REG, &tmp) && (tmp & 0x04)) + if (davinci_eth_phy_read(phy_addr, MII_STATUS_REG, &tmp) && + (tmp & 0x04)) { +#if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \ + defined(CONFIG_MACH_DAVINCI_DA850_EVM) + davinci_eth_phy_read(phy_addr, PHY_ANLPAR, &tmp); + + /* Speed doesn't matter, there is no setting for it in EMAC. */ + if (tmp & (PHY_ANLPAR_TXFD | PHY_ANLPAR_10FD)) { + /* set EMAC for Full Duplex */ + writel(EMAC_MACCONTROL_MIIEN_ENABLE | + EMAC_MACCONTROL_FULLDUPLEX_ENABLE, + &adap_emac->MACCONTROL); + } else { + /*set EMAC for Half Duplex */ + writel(EMAC_MACCONTROL_MIIEN_ENABLE, + &adap_emac->MACCONTROL); + } + + if (tmp & (PHY_ANLPAR_TXFD | PHY_ANLPAR_TX)) + writel(readl(&adap_emac->MACCONTROL) | + EMAC_MACCONTROL_RMIISPEED_100, + &adap_emac->MACCONTROL); + else + writel(readl(&adap_emac->MACCONTROL) & + ~EMAC_MACCONTROL_RMIISPEED_100, + &adap_emac->MACCONTROL); +#endif return(1); + } return(0); } @@ -326,6 +353,12 @@ static int davinci_eth_open(struct eth_device *dev, bd_t *bis) } #endif +#if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \ + defined(CONFIG_MACH_DAVINCI_DA850_EVM) + adap_ewrap->c0rxen = adap_ewrap->c1rxen = adap_ewrap->c2rxen = 0; + adap_ewrap->c0txen = adap_ewrap->c1txen = adap_ewrap->c2txen = 0; + adap_ewrap->c0miscen = adap_ewrap->c1miscen = adap_ewrap->c2miscen = 0; +#endif rx_desc = emac_rx_desc; writel(1, &adap_emac->TXCONTROL); @@ -480,6 +513,12 @@ static void davinci_eth_close(struct eth_device *dev) writel(0, &adap_ewrap->EWCTL); #endif +#if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \ + defined(CONFIG_MACH_DAVINCI_DA850_EVM) + adap_ewrap->c0rxen = adap_ewrap->c1rxen = adap_ewrap->c2rxen = 0; + adap_ewrap->c0txen = adap_ewrap->c1txen = adap_ewrap->c2txen = 0; + adap_ewrap->c0miscen = adap_ewrap->c1miscen = adap_ewrap->c2miscen = 0; +#endif debug_emac("- emac_close\n"); } diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c index cf1da6b6a2..fef57b4337 100644 --- a/drivers/power/twl6030.c +++ b/drivers/power/twl6030.c @@ -36,6 +36,54 @@ static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg) return i2c_read(chip_no, reg, 1, val, 1); } +static int twl6030_gpadc_read_channel(u8 channel_no) +{ + u8 lsb = 0; + u8 msb = 0; + int ret = 0; + + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, &lsb, + GPCH0_LSB + channel_no * 2); + if (ret) + return ret; + + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, &msb, + GPCH0_MSB + channel_no * 2); + if (ret) + return ret; + + return (msb << 8) | lsb; +} + +static int twl6030_gpadc_sw2_trigger(void) +{ + u8 val; + int ret = 0; + + ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC, CTRL_P2_SP2, CTRL_P2); + if (ret) + return ret; + + /* Waiting until the SW1 conversion ends*/ + val = CTRL_P2_BUSY; + + while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) { + ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC, &val, CTRL_P2); + if (ret) + return ret; + udelay(1000); + } + + return 0; +} + +void twl6030_stop_usb_charging(void) +{ + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, 0, CONTROLLER_CTRL1); + + return; +} + void twl6030_start_usb_charging(void) { twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VICHRG_1500, @@ -48,17 +96,89 @@ void twl6030_start_usb_charging(void) CHARGERUSB_INT_MASK); twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VOREG_4P0, CHARGERUSB_VOREG); - twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL2_VITERM_100, + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL2_VITERM_400, CHARGERUSB_CTRL2); + twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TERM, CHARGERUSB_CTRL1); /* Enable USB charging */ twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1_EN_CHARGER, CONTROLLER_CTRL1); return; } +int twl6030_get_battery_current(void) +{ + int battery_current = 0; + u8 msb = 0; + u8 lsb = 0; + + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, &msb, FG_REG_11); + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, &lsb, FG_REG_10); + battery_current = ((msb << 8) | lsb); + + /* convert 10 bit signed number to 16 bit signed number */ + if (battery_current >= 0x2000) + battery_current = (battery_current - 0x4000); + + battery_current = battery_current * 3000 / 4096; + printf("Battery Current: %d mA\n", battery_current); + + return battery_current; +} + +int twl6030_get_battery_voltage(void) +{ + int battery_volt = 0; + int ret = 0; + + /* Start GPADC SW conversion */ + ret = twl6030_gpadc_sw2_trigger(); + if (ret) { + printf("Failed to convert battery voltage\n"); + return ret; + } + + /* measure Vbat voltage */ + battery_volt = twl6030_gpadc_read_channel(7); + if (battery_volt < 0) { + printf("Failed to read battery voltage\n"); + return ret; + } + battery_volt = (battery_volt * 25 * 1000) >> (10 + 2); + printf("Battery Voltage: %d mV\n", battery_volt); + + return battery_volt; +} + void twl6030_init_battery_charging(void) { - twl6030_start_usb_charging(); + u8 stat1 = 0; + int battery_volt = 0; + int ret = 0; + + /* Enable VBAT measurement */ + twl6030_i2c_write_u8(TWL6030_CHIP_PM, VBAT_MEAS, MISC1); + + /* Enable GPADC module */ + ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, FGS | GPADCS, TOGGLE1); + if (ret) { + printf("Failed to enable GPADC\n"); + return; + } + + battery_volt = twl6030_get_battery_voltage(); + if (battery_volt < 0) + return; + + if (battery_volt < 3000) + printf("Main battery voltage too low!\n"); + + /* Check for the presence of USB charger */ + twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, &stat1, CONTROLLER_STAT1); + + /* check for battery presence indirectly via Fuel gauge */ + if ((stat1 & VBUS_DET) && (battery_volt < 3300)) + twl6030_start_usb_charging(); + return; } diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index c0ae947242..5dfcde8774 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -47,14 +47,20 @@ static int pl01x_tstc (int portnum); unsigned int baudrate = CONFIG_BAUDRATE; DECLARE_GLOBAL_DATA_PTR; +static struct pl01x_regs *pl01x_get_regs(int portnum) +{ + return (struct pl01x_regs *) port[portnum]; +} + #ifdef CONFIG_PL010_SERIAL int serial_init (void) { + struct pl01x_regs *regs = pl01x_get_regs(CONSOLE_PORT); unsigned int divisor; /* First, disable everything */ - writel(0x0, port[CONSOLE_PORT] + UART_PL010_CR); + writel(0, ®s->pl010_cr); /* Set baud rate */ switch (baudrate) { @@ -82,15 +88,14 @@ int serial_init (void) divisor = UART_PL010_BAUD_38400; } - writel(((divisor & 0xf00) >> 8), port[CONSOLE_PORT] + UART_PL010_LCRM); - writel((divisor & 0xff), port[CONSOLE_PORT] + UART_PL010_LCRL); + writel((divisor & 0xf00) >> 8, ®s->pl010_lcrm); + writel(divisor & 0xff, ®s->pl010_lcrl); /* Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled */ - writel((UART_PL010_LCRH_WLEN_8 | UART_PL010_LCRH_FEN), - port[CONSOLE_PORT] + UART_PL010_LCRH); + writel(UART_PL010_LCRH_WLEN_8 | UART_PL010_LCRH_FEN, ®s->pl010_lcrh); /* Finally, enable the UART */ - writel((UART_PL010_CR_UARTEN), port[CONSOLE_PORT] + UART_PL010_CR); + writel(UART_PL010_CR_UARTEN, ®s->pl010_cr); return 0; } @@ -101,13 +106,14 @@ int serial_init (void) int serial_init (void) { + struct pl01x_regs *regs = pl01x_get_regs(CONSOLE_PORT); unsigned int temp; unsigned int divider; unsigned int remainder; unsigned int fraction; /* First, disable everything */ - writel(0x0, port[CONSOLE_PORT] + UART_PL011_CR); + writel(0, ®s->pl011_cr); /* * Set baud rate @@ -121,16 +127,16 @@ int serial_init (void) temp = (8 * remainder) / baudrate; fraction = (temp >> 1) + (temp & 1); - writel(divider, port[CONSOLE_PORT] + UART_PL011_IBRD); - writel(fraction, port[CONSOLE_PORT] + UART_PL011_FBRD); + writel(divider, ®s->pl011_ibrd); + writel(fraction, ®s->pl011_fbrd); /* Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled */ - writel((UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN), - port[CONSOLE_PORT] + UART_PL011_LCRH); + writel(UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN, + ®s->pl011_lcrh); /* Finally, enable the UART */ - writel((UART_PL011_CR_UARTEN | UART_PL011_CR_TXE | UART_PL011_CR_RXE), - port[CONSOLE_PORT] + UART_PL011_CR); + writel(UART_PL011_CR_UARTEN | UART_PL011_CR_TXE | UART_PL011_CR_RXE, + ®s->pl011_cr); return 0; } @@ -170,28 +176,31 @@ void serial_setbrg (void) static void pl01x_putc (int portnum, char c) { + struct pl01x_regs *regs = pl01x_get_regs(portnum); + /* Wait until there is space in the FIFO */ - while (readl(port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_TXFF) + while (readl(®s->fr) & UART_PL01x_FR_TXFF) WATCHDOG_RESET(); /* Send the character */ - writel(c, port[portnum] + UART_PL01x_DR); + writel(c, ®s->dr); } static int pl01x_getc (int portnum) { + struct pl01x_regs *regs = pl01x_get_regs(portnum); unsigned int data; /* Wait until there is data in the FIFO */ - while (readl(port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_RXFE) + while (readl(®s->fr) & UART_PL01x_FR_RXFE) WATCHDOG_RESET(); - data = readl(port[portnum] + UART_PL01x_DR); + data = readl(®s->dr); /* Check for an error flag */ if (data & 0xFFFFFF00) { /* Clear the error */ - writel(0xFFFFFFFF, port[portnum] + UART_PL01x_ECR); + writel(0xFFFFFFFF, ®s->ecr); return -1; } @@ -200,7 +209,8 @@ static int pl01x_getc (int portnum) static int pl01x_tstc (int portnum) { + struct pl01x_regs *regs = pl01x_get_regs(portnum); + WATCHDOG_RESET(); - return !(readl(port[portnum] + UART_PL01x_FR) & - UART_PL01x_FR_RXFE); + return !(readl(®s->fr) & UART_PL01x_FR_RXFE); } diff --git a/drivers/serial/serial_pl01x.h b/drivers/serial/serial_pl01x.h index 5f20fdd108..b670c24e11 100644 --- a/drivers/serial/serial_pl01x.h +++ b/drivers/serial/serial_pl01x.h @@ -29,10 +29,28 @@ * Definitions common to both PL010 & PL011 * */ -#define UART_PL01x_DR 0x00 /* Data read or written from the interface. */ -#define UART_PL01x_RSR 0x04 /* Receive status register (Read). */ -#define UART_PL01x_ECR 0x04 /* Error clear register (Write). */ -#define UART_PL01x_FR 0x18 /* Flag register (Read only). */ + +#ifndef __ASSEMBLY__ +/* + * We can use a combined structure for PL010 and PL011, because they overlap + * only in common registers. + */ +struct pl01x_regs { + u32 dr; /* 0x00 Data register */ + u32 ecr; /* 0x04 Error clear register (Write) */ + u32 pl010_lcrh; /* 0x08 Line control register, high byte */ + u32 pl010_lcrm; /* 0x0C Line control register, middle byte */ + u32 pl010_lcrl; /* 0x10 Line control register, low byte */ + u32 pl010_cr; /* 0x14 Control register */ + u32 fr; /* 0x18 Flag register (Read only) */ + u32 reserved; + u32 ilpr; /* 0x20 IrDA low-power counter register */ + u32 pl011_ibrd; /* 0x24 Integer baud rate register */ + u32 pl011_fbrd; /* 0x28 Fractional baud rate register */ + u32 pl011_lcrh; /* 0x2C Line control register */ + u32 pl011_cr; /* 0x30 Control register */ +}; +#endif #define UART_PL01x_RSR_OE 0x08 #define UART_PL01x_RSR_BE 0x04 @@ -50,14 +68,6 @@ * PL010 definitions * */ -#define UART_PL010_LCRH 0x08 /* Line control register, high byte. */ -#define UART_PL010_LCRM 0x0C /* Line control register, middle byte. */ -#define UART_PL010_LCRL 0x10 /* Line control register, low byte. */ -#define UART_PL010_CR 0x14 /* Control register. */ -#define UART_PL010_IIR 0x1C /* Interrupt indentification register (Read). */ -#define UART_PL010_ICR 0x1C /* Interrupt clear register (Write). */ -#define UART_PL010_ILPR 0x20 /* IrDA low power counter register. */ - #define UART_PL010_CR_LPE (1 << 7) #define UART_PL010_CR_RTIE (1 << 6) #define UART_PL010_CR_TIE (1 << 5) @@ -93,13 +103,6 @@ * PL011 definitions * */ -#define UART_PL011_IBRD 0x24 -#define UART_PL011_FBRD 0x28 -#define UART_PL011_LCRH 0x2C -#define UART_PL011_CR 0x30 -#define UART_PL011_IMSC 0x38 -#define UART_PL011_PERIPH_ID0 0xFE0 - #define UART_PL011_LCRH_SPS (1 << 7) #define UART_PL011_LCRH_WLEN_8 (3 << 5) #define UART_PL011_LCRH_WLEN_7 (2 << 5) diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 117ab1988d..e34a124239 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -35,6 +35,7 @@ COBJS-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o COBJS-$(CONFIG_MPC52XX_SPI) += mpc52xx_spi.o COBJS-$(CONFIG_MPC8XXX_SPI) += mpc8xxx_spi.o COBJS-$(CONFIG_MXC_SPI) += mxc_spi.o +COBJS-$(CONFIG_OMAP3_SPI) += omap3_spi.o COBJS-$(CONFIG_SOFT_SPI) += soft_spi.o COBJS := $(COBJS-y) diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c new file mode 100644 index 0000000000..af12c0e590 --- /dev/null +++ b/drivers/spi/omap3_spi.c @@ -0,0 +1,352 @@ +/* + * Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com> + * + * Driver for McSPI controller on OMAP3. Based on davinci_spi.c + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ + * + * Copyright (C) 2007 Atmel Corporation + * + * Parts taken from linux/drivers/spi/omap2_mcspi.c + * Copyright (C) 2005, 2006 Nokia Corporation + * + * Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + +#include <common.h> +#include <spi.h> +#include <malloc.h> +#include <asm/io.h> +#include "omap3_spi.h" + +#define WORD_LEN 8 +#define SPI_WAIT_TIMEOUT 3000000; + +static void spi_reset(struct omap3_spi_slave *ds) +{ + unsigned int tmp; + + writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, &ds->regs->sysconfig); + do { + tmp = readl(&ds->regs->sysstatus); + } while (!(tmp & OMAP3_MCSPI_SYSSTATUS_RESETDONE)); + + writel(OMAP3_MCSPI_SYSCONFIG_AUTOIDLE | + OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP | + OMAP3_MCSPI_SYSCONFIG_SMARTIDLE, + &ds->regs->sysconfig); + + writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, &ds->regs->wakeupenable); +} + +void spi_init() +{ + /* do nothing */ +} + +struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode) +{ + struct omap3_spi_slave *ds; + + ds = malloc(sizeof(struct omap3_spi_slave)); + if (!ds) { + printf("SPI error: malloc of SPI structure failed\n"); + return NULL; + } + + /* + * OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules) + * with different number of chip selects (CS, channels): + * McSPI1 has 4 CS (bus 0, cs 0 - 3) + * McSPI2 has 2 CS (bus 1, cs 0 - 1) + * McSPI3 has 2 CS (bus 2, cs 0 - 1) + * McSPI4 has 1 CS (bus 3, cs 0) + */ + + switch (bus) { + case 0: + ds->regs = (struct mcspi *)OMAP3_MCSPI1_BASE; + break; + case 1: + ds->regs = (struct mcspi *)OMAP3_MCSPI2_BASE; + break; + case 2: + ds->regs = (struct mcspi *)OMAP3_MCSPI3_BASE; + break; + case 3: + ds->regs = (struct mcspi *)OMAP3_MCSPI4_BASE; + break; + default: + printf("SPI error: unsupported bus %i. \ + Supported busses 0 - 3\n", bus); + return NULL; + } + ds->slave.bus = bus; + + if (((bus == 0) && (cs > 3)) || + ((bus == 1) && (cs > 1)) || + ((bus == 2) && (cs > 1)) || + ((bus == 3) && (cs > 0))) { + printf("SPI error: unsupported chip select %i \ + on bus %i\n", cs, bus); + return NULL; + } + ds->slave.cs = cs; + + if (max_hz > OMAP3_MCSPI_MAX_FREQ) { + printf("SPI error: unsupported frequency %i Hz. \ + Max frequency is 48 Mhz\n", max_hz); + return NULL; + } + ds->freq = max_hz; + + if (mode > SPI_MODE_3) { + printf("SPI error: unsupported SPI mode %i\n", mode); + return NULL; + } + ds->mode = mode; + + return &ds->slave; +} + +void spi_free_slave(struct spi_slave *slave) +{ + struct omap3_spi_slave *ds = to_omap3_spi(slave); + + free(ds); +} + +int spi_claim_bus(struct spi_slave *slave) +{ + struct omap3_spi_slave *ds = to_omap3_spi(slave); + unsigned int conf, div = 0; + + /* McSPI global module configuration */ + + /* + * setup when switching from (reset default) slave mode + * to single-channel master mode + */ + spi_reset(ds); + conf = readl(&ds->regs->modulctrl); + conf &= ~(OMAP3_MCSPI_MODULCTRL_STEST | OMAP3_MCSPI_MODULCTRL_MS); + conf |= OMAP3_MCSPI_MODULCTRL_SINGLE; + writel(conf, &ds->regs->modulctrl); + + /* McSPI individual channel configuration */ + + /* Calculate clock divisor. Valid range: 0x0 - 0xC ( /1 - /4096 ) */ + if (ds->freq) { + while (div <= 0xC && (OMAP3_MCSPI_MAX_FREQ / (1 << div)) + > ds->freq) + div++; + } else + div = 0xC; + + conf = readl(&ds->regs->channel[ds->slave.cs].chconf); + + /* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS + * REVISIT: this controller could support SPI_3WIRE mode. + */ + conf &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1); + conf |= OMAP3_MCSPI_CHCONF_DPE0; + + /* wordlength */ + conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK; + conf |= (WORD_LEN - 1) << 7; + + /* set chipselect polarity; manage with FORCE */ + if (!(ds->mode & SPI_CS_HIGH)) + conf |= OMAP3_MCSPI_CHCONF_EPOL; /* active-low; normal */ + else + conf &= ~OMAP3_MCSPI_CHCONF_EPOL; + + /* set clock divisor */ + conf &= ~OMAP3_MCSPI_CHCONF_CLKD_MASK; + conf |= div << 2; + + /* set SPI mode 0..3 */ + if (ds->mode & SPI_CPOL) + conf |= OMAP3_MCSPI_CHCONF_POL; + else + conf &= ~OMAP3_MCSPI_CHCONF_POL; + if (ds->mode & SPI_CPHA) + conf |= OMAP3_MCSPI_CHCONF_PHA; + else + conf &= ~OMAP3_MCSPI_CHCONF_PHA; + + /* Transmit & receive mode */ + conf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK; + + writel(conf, &ds->regs->channel[ds->slave.cs].chconf); + + return 0; +} + +void spi_release_bus(struct spi_slave *slave) +{ + struct omap3_spi_slave *ds = to_omap3_spi(slave); + + /* Reset the SPI hardware */ + spi_reset(ds); +} + +int omap3_spi_write(struct spi_slave *slave, unsigned int len, const u8 *txp, + unsigned long flags) +{ + struct omap3_spi_slave *ds = to_omap3_spi(slave); + int i; + int timeout = SPI_WAIT_TIMEOUT; + int chconf = readl(&ds->regs->channel[ds->slave.cs].chconf); + + if (flags & SPI_XFER_BEGIN) + writel(OMAP3_MCSPI_CHCTRL_EN, + &ds->regs->channel[ds->slave.cs].chctrl); + + chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK; + chconf |= OMAP3_MCSPI_CHCONF_TRM_TX_ONLY; + chconf |= OMAP3_MCSPI_CHCONF_FORCE; + writel(chconf, &ds->regs->channel[ds->slave.cs].chconf); + + for (i = 0; i < len; i++) { + /* wait till TX register is empty (TXS == 1) */ + while (!(readl(&ds->regs->channel[ds->slave.cs].chstat) & + OMAP3_MCSPI_CHSTAT_TXS)) { + if (--timeout <= 0) { + printf("SPI TXS timed out, status=0x%08x\n", + readl(&ds->regs->channel[ds->slave.cs].chstat)); + return -1; + } + } + /* Write the data */ + writel(txp[i], &ds->regs->channel[ds->slave.cs].tx); + } + + if (flags & SPI_XFER_END) { + /* wait to finish of transfer */ + while (!(readl(&ds->regs->channel[ds->slave.cs].chstat) & + OMAP3_MCSPI_CHSTAT_EOT)); + + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE; + writel(chconf, &ds->regs->channel[ds->slave.cs].chconf); + + writel(0, &ds->regs->channel[ds->slave.cs].chctrl); + } + return 0; +} + +int omap3_spi_read(struct spi_slave *slave, unsigned int len, u8 *rxp, + unsigned long flags) +{ + struct omap3_spi_slave *ds = to_omap3_spi(slave); + int i; + int timeout = SPI_WAIT_TIMEOUT; + int chconf = readl(&ds->regs->channel[ds->slave.cs].chconf); + + if (flags & SPI_XFER_BEGIN) + writel(OMAP3_MCSPI_CHCTRL_EN, + &ds->regs->channel[ds->slave.cs].chctrl); + + chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK; + chconf |= OMAP3_MCSPI_CHCONF_TRM_RX_ONLY; + chconf |= OMAP3_MCSPI_CHCONF_FORCE; + writel(chconf, &ds->regs->channel[ds->slave.cs].chconf); + + writel(0, &ds->regs->channel[ds->slave.cs].tx); + + for (i = 0; i < len; i++) { + /* Wait till RX register contains data (RXS == 1) */ + while (!(readl(&ds->regs->channel[ds->slave.cs].chstat) & + OMAP3_MCSPI_CHSTAT_RXS)) { + if (--timeout <= 0) { + printf("SPI RXS timed out, status=0x%08x\n", + readl(&ds->regs->channel[ds->slave.cs].chstat)); + return -1; + } + } + /* Read the data */ + rxp[i] = readl(&ds->regs->channel[ds->slave.cs].rx); + } + + if (flags & SPI_XFER_END) { + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE; + writel(chconf, &ds->regs->channel[ds->slave.cs].chconf); + + writel(0, &ds->regs->channel[ds->slave.cs].chctrl); + } + + return 0; +} + +int spi_xfer(struct spi_slave *slave, unsigned int bitlen, + const void *dout, void *din, unsigned long flags) +{ + struct omap3_spi_slave *ds = to_omap3_spi(slave); + unsigned int len; + const u8 *txp = dout; + u8 *rxp = din; + int ret = -1; + + if (bitlen % 8) + return -1; + + len = bitlen / 8; + + if (bitlen == 0) { /* only change CS */ + int chconf = readl(&ds->regs->channel[ds->slave.cs].chconf); + + if (flags & SPI_XFER_BEGIN) { + writel(OMAP3_MCSPI_CHCTRL_EN, + &ds->regs->channel[ds->slave.cs].chctrl); + chconf |= OMAP3_MCSPI_CHCONF_FORCE; + writel(chconf, + &ds->regs->channel[ds->slave.cs].chconf); + } + if (flags & SPI_XFER_END) { + chconf &= ~OMAP3_MCSPI_CHCONF_FORCE; + writel(chconf, + &ds->regs->channel[ds->slave.cs].chconf); + writel(0, &ds->regs->channel[ds->slave.cs].chctrl); + } + ret = 0; + } else { + if (dout != NULL) + ret = omap3_spi_write(slave, len, txp, flags); + + if (din != NULL) + ret = omap3_spi_read(slave, len, rxp, flags); + } + return ret; +} + +int spi_cs_is_valid(unsigned int bus, unsigned int cs) +{ + return 1; +} + +void spi_cs_activate(struct spi_slave *slave) +{ +} + +void spi_cs_deactivate(struct spi_slave *slave) +{ +} diff --git a/drivers/spi/omap3_spi.h b/drivers/spi/omap3_spi.h new file mode 100644 index 0000000000..b8e3a4c44c --- /dev/null +++ b/drivers/spi/omap3_spi.h @@ -0,0 +1,117 @@ +/* + * Register definitions for the OMAP3 McSPI Controller + * + * Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com> + * + * Parts taken from linux/drivers/spi/omap2_mcspi.c + * Copyright (C) 2005, 2006 Nokia Corporation + * + * Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _OMAP3_SPI_H_ +#define _OMAP3_SPI_H_ + +#define OMAP3_MCSPI1_BASE 0x48098000 +#define OMAP3_MCSPI2_BASE 0x4809A000 +#define OMAP3_MCSPI3_BASE 0x480B8000 +#define OMAP3_MCSPI4_BASE 0x480BA000 + +#define OMAP3_MCSPI_MAX_FREQ 48000000 + +/* OMAP3 McSPI registers */ +struct mcspi_channel { + unsigned int chconf; /* 0x2C, 0x40, 0x54, 0x68 */ + unsigned int chstat; /* 0x30, 0x44, 0x58, 0x6C */ + unsigned int chctrl; /* 0x34, 0x48, 0x5C, 0x70 */ + unsigned int tx; /* 0x38, 0x4C, 0x60, 0x74 */ + unsigned int rx; /* 0x3C, 0x50, 0x64, 0x78 */ +}; + +struct mcspi { + unsigned char res1[0x10]; + unsigned int sysconfig; /* 0x10 */ + unsigned int sysstatus; /* 0x14 */ + unsigned int irqstatus; /* 0x18 */ + unsigned int irqenable; /* 0x1C */ + unsigned int wakeupenable; /* 0x20 */ + unsigned int syst; /* 0x24 */ + unsigned int modulctrl; /* 0x28 */ + struct mcspi_channel channel[4]; /* channel0: 0x2C - 0x3C, bus 0 & 1 & 2 & 3 */ + /* channel1: 0x40 - 0x50, bus 0 & 1 */ + /* channel2: 0x54 - 0x64, bus 0 & 1 */ + /* channel3: 0x68 - 0x78, bus 0 */ +}; + +/* per-register bitmasks */ +#define OMAP3_MCSPI_SYSCONFIG_SMARTIDLE (2 << 3) +#define OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP (1 << 2) +#define OMAP3_MCSPI_SYSCONFIG_AUTOIDLE (1 << 0) +#define OMAP3_MCSPI_SYSCONFIG_SOFTRESET (1 << 1) + +#define OMAP3_MCSPI_SYSSTATUS_RESETDONE (1 << 0) + +#define OMAP3_MCSPI_MODULCTRL_SINGLE (1 << 0) +#define OMAP3_MCSPI_MODULCTRL_MS (1 << 2) +#define OMAP3_MCSPI_MODULCTRL_STEST (1 << 3) + +#define OMAP3_MCSPI_CHCONF_PHA (1 << 0) +#define OMAP3_MCSPI_CHCONF_POL (1 << 1) +#define OMAP3_MCSPI_CHCONF_CLKD_MASK (0x0f << 2) +#define OMAP3_MCSPI_CHCONF_EPOL (1 << 6) +#define OMAP3_MCSPI_CHCONF_WL_MASK (0x1f << 7) +#define OMAP3_MCSPI_CHCONF_TRM_RX_ONLY (0x01 << 12) +#define OMAP3_MCSPI_CHCONF_TRM_TX_ONLY (0x02 << 12) +#define OMAP3_MCSPI_CHCONF_TRM_MASK (0x03 << 12) +#define OMAP3_MCSPI_CHCONF_DMAW (1 << 14) +#define OMAP3_MCSPI_CHCONF_DMAR (1 << 15) +#define OMAP3_MCSPI_CHCONF_DPE0 (1 << 16) +#define OMAP3_MCSPI_CHCONF_DPE1 (1 << 17) +#define OMAP3_MCSPI_CHCONF_IS (1 << 18) +#define OMAP3_MCSPI_CHCONF_TURBO (1 << 19) +#define OMAP3_MCSPI_CHCONF_FORCE (1 << 20) + +#define OMAP3_MCSPI_CHSTAT_RXS (1 << 0) +#define OMAP3_MCSPI_CHSTAT_TXS (1 << 1) +#define OMAP3_MCSPI_CHSTAT_EOT (1 << 2) + +#define OMAP3_MCSPI_CHCTRL_EN (1 << 0) + +#define OMAP3_MCSPI_WAKEUPENABLE_WKEN (1 << 0) + +struct omap3_spi_slave { + struct spi_slave slave; + struct mcspi *regs; + unsigned int freq; + unsigned int mode; +}; + +static inline struct omap3_spi_slave *to_omap3_spi(struct spi_slave *slave) +{ + return container_of(slave, struct omap3_spi_slave, slave); +} + +int omap3_spi_write(struct spi_slave *slave, unsigned int len, const u8 *txp, + unsigned long flags); +int omap3_spi_read(struct spi_slave *slave, unsigned int len, u8 *rxp, + unsigned long flags); + +#endif /* _OMAP3_SPI_H_ */ |
