diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/Makefile | 2 | ||||
| -rw-r--r-- | drivers/i2c/sh_i2c.c | 294 |
2 files changed, 132 insertions, 164 deletions
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 5280bb3fe..0899b6e5a 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -18,7 +18,6 @@ obj-$(CONFIG_PCA9564_I2C) += pca9564_i2c.o obj-$(CONFIG_DRIVER_S3C24X0_I2C) += s3c24x0_i2c.o obj-$(CONFIG_TSI108_I2C) += tsi108_i2c.o obj-$(CONFIG_U8500_I2C) += u8500_i2c.o -obj-$(CONFIG_SH_I2C) += sh_i2c.o obj-$(CONFIG_SH_SH7734_I2C) += sh_sh7734_i2c.o obj-$(CONFIG_SYS_I2C) += i2c_core.o obj-$(CONFIG_SYS_I2C_FSL) += fsl_i2c.o @@ -26,6 +25,7 @@ obj-$(CONFIG_SYS_I2C_FTI2C010) += fti2c010.o obj-$(CONFIG_SYS_I2C_MXC) += mxc_i2c.o obj-$(CONFIG_SYS_I2C_PPC4XX) += ppc4xx_i2c.o obj-$(CONFIG_SYS_I2C_RCAR) += rcar_i2c.o +obj-$(CONFIG_SYS_I2C_SH) += sh_i2c.o obj-$(CONFIG_SYS_I2C_SOFT) += soft_i2c.o obj-$(CONFIG_SYS_I2C_TEGRA) += tegra_i2c.o obj-$(CONFIG_ZYNQ_I2C) += zynq_i2c.o diff --git a/drivers/i2c/sh_i2c.c b/drivers/i2c/sh_i2c.c index 808202c29..cc1910075 100644 --- a/drivers/i2c/sh_i2c.c +++ b/drivers/i2c/sh_i2c.c @@ -6,6 +6,7 @@ */ #include <common.h> +#include <i2c.h> #include <asm/io.h> DECLARE_GLOBAL_DATA_PTR; @@ -22,8 +23,6 @@ struct sh_i2c { }; #undef ureg -static struct sh_i2c *base; - /* ICCR */ #define SH_I2C_ICCR_ICE (1 << 7) #define SH_I2C_ICCR_RACK (1 << 6) @@ -43,202 +42,165 @@ static struct sh_i2c *base; #define SH_I2C_ICIC_ICCHB8 (1 << 6) #endif +static const struct sh_i2c *i2c_dev[CONFIG_SYS_I2C_SH_NUM_CONTROLLERS] = { + (struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE0, +#ifdef CONFIG_SYS_I2C_SH_BASE1 + (struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE1, +#endif +#ifdef CONFIG_SYS_I2C_SH_BASE2 + (struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE2, +#endif +#ifdef CONFIG_SYS_I2C_SH_BASE3 + (struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE3, +#endif +#ifdef CONFIG_SYS_I2C_SH_BASE4 + (struct sh_i2c *)CONFIG_SYS_I2C_SH_BASE4, +#endif +}; + static u16 iccl, icch; #define IRQ_WAIT 1000 -static void irq_dte(struct sh_i2c *base) +static void sh_irq_dte(struct sh_i2c *dev) { int i; - for (i = 0 ; i < IRQ_WAIT ; i++) { - if (SH_IC_DTE & readb(&base->icsr)) + for (i = 0; i < IRQ_WAIT; i++) { + if (SH_IC_DTE & readb(&dev->icsr)) break; udelay(10); } } -static int irq_dte_with_tack(struct sh_i2c *base) +static int sh_irq_dte_with_tack(struct sh_i2c *dev) { int i; - for (i = 0 ; i < IRQ_WAIT ; i++) { - if (SH_IC_DTE & readb(&base->icsr)) + for (i = 0; i < IRQ_WAIT; i++) { + if (SH_IC_DTE & readb(&dev->icsr)) break; - if (SH_IC_TACK & readb(&base->icsr)) + if (SH_IC_TACK & readb(&dev->icsr)) return -1; udelay(10); } return 0; } -static void irq_busy(struct sh_i2c *base) +static void sh_irq_busy(struct sh_i2c *dev) { int i; - for (i = 0 ; i < IRQ_WAIT ; i++) { - if (!(SH_IC_BUSY & readb(&base->icsr))) + for (i = 0; i < IRQ_WAIT; i++) { + if (!(SH_IC_BUSY & readb(&dev->icsr))) break; udelay(10); } } -static int i2c_set_addr(struct sh_i2c *base, u8 id, u8 reg, int stop) +static int sh_i2c_set_addr(struct sh_i2c *dev, u8 chip, u8 addr, int stop) { u8 icic = SH_IC_TACK; - clrbits_8(&base->iccr, SH_I2C_ICCR_ICE); - setbits_8(&base->iccr, SH_I2C_ICCR_ICE); + debug("%s: chip: %x, addr: %x iccl: %x, icch %x\n", + __func__, chip, addr, iccl, icch); + clrbits_8(&dev->iccr, SH_I2C_ICCR_ICE); + setbits_8(&dev->iccr, SH_I2C_ICCR_ICE); - writeb(iccl & 0xff, &base->iccl); - writeb(icch & 0xff, &base->icch); + writeb(iccl & 0xff, &dev->iccl); + writeb(icch & 0xff, &dev->icch); #ifdef CONFIG_SH_I2C_8BIT if (iccl > 0xff) icic |= SH_I2C_ICIC_ICCLB8; if (icch > 0xff) icic |= SH_I2C_ICIC_ICCHB8; #endif - writeb(icic, &base->icic); + writeb(icic, &dev->icic); - writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &base->iccr); - irq_dte(base); + writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &dev->iccr); + sh_irq_dte(dev); - clrbits_8(&base->icsr, SH_IC_TACK); - writeb(id << 1, &base->icdr); - if (irq_dte_with_tack(base) != 0) + clrbits_8(&dev->icsr, SH_IC_TACK); + writeb(chip << 1, &dev->icdr); + if (sh_irq_dte_with_tack(dev) != 0) return -1; - writeb(reg, &base->icdr); + writeb(addr, &dev->icdr); if (stop) - writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS), &base->iccr); + writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS), &dev->iccr); - if (irq_dte_with_tack(base) != 0) + if (sh_irq_dte_with_tack(dev) != 0) return -1; return 0; } -static void i2c_finish(struct sh_i2c *base) +static void sh_i2c_finish(struct sh_i2c *dev) { - writeb(0, &base->icsr); - clrbits_8(&base->iccr, SH_I2C_ICCR_ICE); + writeb(0, &dev->icsr); + clrbits_8(&dev->iccr, SH_I2C_ICCR_ICE); } -static int i2c_raw_write(struct sh_i2c *base, u8 id, u8 reg, u8 val) +static int +sh_i2c_raw_write(struct sh_i2c *dev, u8 chip, uint addr, u8 val) { int ret = -1; - if (i2c_set_addr(base, id, reg, 0) != 0) + if (sh_i2c_set_addr(dev, chip, addr, 0) != 0) goto exit0; udelay(10); - writeb(val, &base->icdr); - if (irq_dte_with_tack(base) != 0) + writeb(val, &dev->icdr); + if (sh_irq_dte_with_tack(dev) != 0) goto exit0; - writeb((SH_I2C_ICCR_ICE | SH_I2C_ICCR_RTS), &base->iccr); - if (irq_dte_with_tack(base) != 0) + writeb((SH_I2C_ICCR_ICE | SH_I2C_ICCR_RTS), &dev->iccr); + if (sh_irq_dte_with_tack(dev) != 0) goto exit0; - irq_busy(base); + sh_irq_busy(dev); ret = 0; + exit0: - i2c_finish(base); + sh_i2c_finish(dev); return ret; } -static int i2c_raw_read(struct sh_i2c *base, u8 id, u8 reg) +static int sh_i2c_raw_read(struct sh_i2c *dev, u8 chip, u8 addr) { int ret = -1; #if defined(CONFIG_SH73A0) - if (i2c_set_addr(base, id, reg, 0) != 0) + if (sh_i2c_set_addr(dev, chip, addr, 0) != 0) goto exit0; #else - if (i2c_set_addr(base, id, reg, 1) != 0) + if (sh_i2c_set_addr(dev, chip, addr, 1) != 0) goto exit0; udelay(100); #endif - writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &base->iccr); - irq_dte(base); + writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RTS|SH_I2C_ICCR_BUSY), &dev->iccr); + sh_irq_dte(dev); - writeb(id << 1 | 0x01, &base->icdr); - if (irq_dte_with_tack(base) != 0) + writeb(chip << 1 | 0x01, &dev->icdr); + if (sh_irq_dte_with_tack(dev) != 0) goto exit0; - writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_SCP), &base->iccr); - if (irq_dte_with_tack(base) != 0) + writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_SCP), &dev->iccr); + if (sh_irq_dte_with_tack(dev) != 0) goto exit0; - ret = readb(&base->icdr) & 0xff; + ret = readb(&dev->icdr) & 0xff; + + writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RACK), &dev->iccr); + readb(&dev->icdr); /* Dummy read */ + sh_irq_busy(dev); - writeb((SH_I2C_ICCR_ICE|SH_I2C_ICCR_RACK), &base->iccr); - readb(&base->icdr); /* Dummy read */ - irq_busy(base); exit0: - i2c_finish(base); + sh_i2c_finish(dev); return ret; } -#ifdef CONFIG_I2C_MULTI_BUS -static unsigned int current_bus; - -/** - * i2c_set_bus_num - change active I2C bus - * @bus: bus index, zero based - * @returns: 0 on success, non-0 on failure - */ -int i2c_set_bus_num(unsigned int bus) -{ - if ((bus < 0) || (bus >= CONFIG_SYS_MAX_I2C_BUS)) { - printf("Bad bus: %d\n", bus); - return -1; - } - - switch (bus) { - case 0: - base = (void *)CONFIG_SH_I2C_BASE0; - break; - case 1: - base = (void *)CONFIG_SH_I2C_BASE1; - break; -#ifdef CONFIG_SH_I2C_BASE2 - case 2: - base = (void *)CONFIG_SH_I2C_BASE2; - break; -#endif -#ifdef CONFIG_SH_I2C_BASE3 - case 3: - base = (void *)CONFIG_SH_I2C_BASE3; - break; -#endif -#ifdef CONFIG_SH_I2C_BASE4 - case 4: - base = (void *)CONFIG_SH_I2C_BASE4; - break; -#endif - default: - return -1; - } - current_bus = bus; - - return 0; -} - -/** - * i2c_get_bus_num - returns index of active I2C bus - */ -unsigned int i2c_get_bus_num(void) -{ - return current_bus; -} -#endif - -#define SH_I2C_ICCL_CALC(clk, date, t_low, t_high) \ - ((clk / rate) * (t_low / t_low + t_high)) -#define SH_I2C_ICCH_CALC(clk, date, t_low, t_high) \ - ((clk / rate) * (t_high / t_low + t_high)) - -void i2c_init(int speed, int slaveaddr) +static void +sh_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd) { int num, denom, tmp; @@ -246,11 +208,6 @@ void i2c_init(int speed, int slaveaddr) if (!(gd->flags & GD_FLG_RELOC)) return; -#ifdef CONFIG_I2C_MULTI_BUS - current_bus = 0; -#endif - base = (struct sh_i2c *)CONFIG_SH_I2C_BASE0; - /* * Calculate the value for iccl. From the data sheet: * iccl = (p-clock / transfer-rate) * (L / (L + H)) @@ -272,67 +229,78 @@ void i2c_init(int speed, int slaveaddr) icch = (u16)((num/denom) + 1); else icch = (u16)(num/denom); + + debug("clock: %d, speed %d, iccl: %x, icch: %x\n", + CONFIG_SH_I2C_CLOCK, speed, iccl, icch); } -/* - * i2c_read: - Read multiple bytes from an i2c device - * - * The higher level routines take into account that this function is only - * called with len < page length of the device (see configuration file) - * - * @chip: address of the chip which is to be read - * @addr: i2c data address within the chip - * @alen: length of the i2c data address (1..2 bytes) - * @buffer: where to write the data - * @len: how much byte do we want to read - * @return: 0 in case of success - */ -int i2c_read(u8 chip, u32 addr, int alen, u8 *buffer, int len) +static int sh_i2c_read(struct i2c_adapter *adap, uint8_t chip, + uint addr, int alen, u8 *data, int len) { - int ret; - int i = 0; - for (i = 0 ; i < len ; i++) { - ret = i2c_raw_read(base, chip, addr + i); + int ret, i; + struct sh_i2c *dev = (struct sh_i2c *)i2c_dev[adap->hwadapnr]; + + for (i = 0; i < len; i++) { + ret = sh_i2c_raw_read(dev, chip, addr + i); if (ret < 0) return -1; - buffer[i] = ret & 0xff; + + data[i] = ret & 0xff; + debug("%s: data[%d]: %02x\n", __func__, i, data[i]); } + return 0; } -/* - * i2c_write: - Write multiple bytes to an i2c device - * - * The higher level routines take into account that this function is only - * called with len < page length of the device (see configuration file) - * - * @chip: address of the chip which is to be written - * @addr: i2c data address within the chip - * @alen: length of the i2c data address (1..2 bytes) - * @buffer: where to find the data to be written - * @len: how much byte do we want to read - * @return: 0 in case of success - */ -int i2c_write(u8 chip, u32 addr, int alen, u8 *buffer, int len) +static int sh_i2c_write(struct i2c_adapter *adap, uint8_t chip, uint addr, + int alen, u8 *data, int len) { - int i = 0; - for (i = 0; i < len ; i++) - if (i2c_raw_write(base, chip, addr + i, buffer[i]) != 0) + struct sh_i2c *dev = (struct sh_i2c *)i2c_dev[adap->hwadapnr]; + int i; + + for (i = 0; i < len; i++) { + debug("%s: data[%d]: %02x\n", __func__, i, data[i]); + if (sh_i2c_raw_write(dev, chip, addr + i, data[i]) != 0) return -1; + } return 0; } -/* - * i2c_probe: - Test if a chip answers for a given i2c address - * - * @chip: address of the chip which is searched for - * @return: 0 if a chip was found, -1 otherwhise - */ -int i2c_probe(u8 chip) +static int +sh_i2c_probe(struct i2c_adapter *adap, u8 dev) { - int ret; + return sh_i2c_read(adap, dev, 0, 0, NULL, 0); +} - ret = i2c_set_addr(base, chip, 0, 1); - i2c_finish(base); - return ret; +static unsigned int sh_i2c_set_bus_speed(struct i2c_adapter *adap, + unsigned int speed) +{ + struct sh_i2c *dev = (struct sh_i2c *)i2c_dev[adap->hwadapnr]; + + sh_i2c_finish(dev); + sh_i2c_init(adap, speed, 0); + + return 0; } + +/* + * Register RCAR i2c adapters + */ +U_BOOT_I2C_ADAP_COMPLETE(sh_0, sh_i2c_init, sh_i2c_probe, sh_i2c_read, + sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED0, 0, 0) +#ifdef CONFIG_SYS_I2C_SH_BASE1 +U_BOOT_I2C_ADAP_COMPLETE(sh_1, sh_i2c_init, sh_i2c_probe, sh_i2c_read, + sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED1, 0, 1) +#endif +#ifdef CONFIG_SYS_I2C_SH_BASE2 +U_BOOT_I2C_ADAP_COMPLETE(sh_2, sh_i2c_init, sh_i2c_probe, sh_i2c_read, + sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED2, 0, 2) +#endif +#ifdef CONFIG_SYS_I2C_SH_BASE3 +U_BOOT_I2C_ADAP_COMPLETE(sh_3, sh_i2c_init, sh_i2c_probe, sh_i2c_read, + sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED3, 0, 3) +#endif +#ifdef CONFIG_SYS_I2C_SH_BASE4 +U_BOOT_I2C_ADAP_COMPLETE(sh_4, sh_i2c_init, sh_i2c_probe, sh_i2c_read, + sh_i2c_write, sh_i2c_set_bus_speed, CONFIG_SYS_I2C_SH_SPEED4, 0, 4) +#endif |