Remove the rcar_i2c driver, since it's no longer used by any board and will be superseded by a DM and DT capable variant.
Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Heiko Schocher hs@denx.de Cc: Nobuhiro Iwamatsu iwamatsu@nigauri.org --- drivers/i2c/Makefile | 1 - drivers/i2c/rcar_i2c.c | 293 ------------------------------------------------- 2 files changed, 294 deletions(-) delete mode 100644 drivers/i2c/rcar_i2c.c
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 169a2f1d7a..4a6e06fbc5 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -30,7 +30,6 @@ obj-$(CONFIG_SYS_I2C_MVTWSI) += mvtwsi.o obj-$(CONFIG_SYS_I2C_MXC) += mxc_i2c.o obj-$(CONFIG_SYS_I2C_MXS) += mxs_i2c.o obj-$(CONFIG_SYS_I2C_OMAP24XX) += omap24xx_i2c.o -obj-$(CONFIG_SYS_I2C_RCAR) += rcar_i2c.o obj-$(CONFIG_SYS_I2C_RCAR_IIC) += rcar_iic.o obj-$(CONFIG_SYS_I2C_ROCKCHIP) += rk_i2c.o obj-$(CONFIG_SYS_I2C_S3C24X0) += s3c24x0_i2c.o exynos_hs_i2c.o diff --git a/drivers/i2c/rcar_i2c.c b/drivers/i2c/rcar_i2c.c deleted file mode 100644 index bfba443f62..0000000000 --- a/drivers/i2c/rcar_i2c.c +++ /dev/null @@ -1,293 +0,0 @@ -/* - * drivers/i2c/rcar_i2c.c - * - * Copyright (C) 2013 Renesas Electronics Corporation - * Copyright (C) 2013 Nobuhiro Iwamatsu nobuhiro.iwamatsu.yj@renesas.com - * - * SPDX-License-Identifier: GPL-2.0 - * - * NOTE: This driver should be converted to driver model before June 2017. - * Please see doc/driver-model/i2c-howto.txt for instructions. - */ - -#include <common.h> -#include <i2c.h> -#include <asm/io.h> - -DECLARE_GLOBAL_DATA_PTR; - -struct rcar_i2c { - u32 icscr; - u32 icmcr; - u32 icssr; - u32 icmsr; - u32 icsier; - u32 icmier; - u32 icccr; - u32 icsar; - u32 icmar; - u32 icrxdtxd; - u32 icccr2; - u32 icmpr; - u32 ichpr; - u32 iclpr; -}; - -#define MCR_MDBS 0x80 /* non-fifo mode switch */ -#define MCR_FSCL 0x40 /* override SCL pin */ -#define MCR_FSDA 0x20 /* override SDA pin */ -#define MCR_OBPC 0x10 /* override pins */ -#define MCR_MIE 0x08 /* master if enable */ -#define MCR_TSBE 0x04 -#define MCR_FSB 0x02 /* force stop bit */ -#define MCR_ESG 0x01 /* en startbit gen. */ - -#define MSR_MASK 0x7f -#define MSR_MNR 0x40 /* nack received */ -#define MSR_MAL 0x20 /* arbitration lost */ -#define MSR_MST 0x10 /* sent a stop */ -#define MSR_MDE 0x08 -#define MSR_MDT 0x04 -#define MSR_MDR 0x02 -#define MSR_MAT 0x01 /* slave addr xfer done */ - -static const struct rcar_i2c *i2c_dev[CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS] = { - (struct rcar_i2c *)CONFIG_SYS_RCAR_I2C0_BASE, - (struct rcar_i2c *)CONFIG_SYS_RCAR_I2C1_BASE, - (struct rcar_i2c *)CONFIG_SYS_RCAR_I2C2_BASE, - (struct rcar_i2c *)CONFIG_SYS_RCAR_I2C3_BASE, -}; - -static void rcar_i2c_raw_rw_common(struct rcar_i2c *dev, u8 chip, uint addr) -{ - /* set slave address */ - writel(chip << 1, &dev->icmar); - /* set register address */ - writel(addr, &dev->icrxdtxd); - /* clear status */ - writel(0, &dev->icmsr); - /* start master send */ - writel(MCR_MDBS | MCR_MIE | MCR_ESG, &dev->icmcr); - - while ((readl(&dev->icmsr) & (MSR_MAT | MSR_MDE)) - != (MSR_MAT | MSR_MDE)) - udelay(10); - - /* clear ESG */ - writel(MCR_MDBS | MCR_MIE, &dev->icmcr); - /* start SCLclk */ - writel(~(MSR_MAT | MSR_MDE), &dev->icmsr); - - while (!(readl(&dev->icmsr) & MSR_MDE)) - udelay(10); -} - -static void rcar_i2c_raw_rw_finish(struct rcar_i2c *dev) -{ - while (!(readl(&dev->icmsr) & MSR_MST)) - udelay(10); - - writel(0, &dev->icmcr); -} - -static int -rcar_i2c_raw_write(struct rcar_i2c *dev, u8 chip, uint addr, u8 *val, int size) -{ - rcar_i2c_raw_rw_common(dev, chip, addr); - - /* set send date */ - writel(*val, &dev->icrxdtxd); - /* start SCLclk */ - writel(~MSR_MDE, &dev->icmsr); - - while (!(readl(&dev->icmsr) & MSR_MDE)) - udelay(10); - - /* set stop condition */ - writel(MCR_MDBS | MCR_MIE | MCR_FSB, &dev->icmcr); - /* start SCLclk */ - writel(~MSR_MDE, &dev->icmsr); - - rcar_i2c_raw_rw_finish(dev); - - return 0; -} - -static u8 -rcar_i2c_raw_read(struct rcar_i2c *dev, u8 chip, uint addr) -{ - u8 ret; - - rcar_i2c_raw_rw_common(dev, chip, addr); - - /* set slave address, receive */ - writel((chip << 1) | 1, &dev->icmar); - /* start master receive */ - writel(MCR_MDBS | MCR_MIE | MCR_ESG, &dev->icmcr); - /* clear status */ - writel(0, &dev->icmsr); - - while ((readl(&dev->icmsr) & (MSR_MAT | MSR_MDR)) - != (MSR_MAT | MSR_MDR)) - udelay(10); - - /* clear ESG */ - writel(MCR_MDBS | MCR_MIE, &dev->icmcr); - /* prepare stop condition */ - writel(MCR_MDBS | MCR_MIE | MCR_FSB, &dev->icmcr); - /* start SCLclk */ - writel(~(MSR_MAT | MSR_MDR), &dev->icmsr); - - while (!(readl(&dev->icmsr) & MSR_MDR)) - udelay(10); - - /* get receive data */ - ret = (u8)readl(&dev->icrxdtxd); - /* start SCLclk */ - writel(~MSR_MDR, &dev->icmsr); - - rcar_i2c_raw_rw_finish(dev); - - return ret; -} - -/* - * SCL = iicck / (20 + SCGD * 8 + F[(ticf + tr + intd) * iicck]) - * iicck : I2C internal clock < 20 MHz - * ticf : I2C SCL falling time: 35 ns - * tr : I2C SCL rising time: 200 ns - * intd : LSI internal delay: I2C0: 50 ns I2C1-3: 5 - * F[n] : n rounded up to an integer - */ -static u32 rcar_clock_gen(int i2c_no, u32 bus_speed) -{ - u32 iicck, f, scl, scgd; - u32 intd = 5; - - int bit = 0, cdf_width = 3; - for (bit = 0; bit < (1 << cdf_width); bit++) { - iicck = CONFIG_HP_CLK_FREQ / (1 + bit); - if (iicck < 20000000) - break; - } - - if (bit > (1 << cdf_width)) { - puts("rcar-i2c: Can not get CDF\n"); - return 0; - } - - if (i2c_no == 0) - intd = 50; - - f = (35 + 200 + intd) * (iicck / 1000000000); - - for (scgd = 0; scgd < 0x40; scgd++) { - scl = iicck / (20 + (scgd * 8) + f); - if (scl <= bus_speed) - break; - } - - if (scgd > 0x40) { - puts("rcar-i2c: Can not get SDGB\n"); - return 0; - } - - debug("%s: scl: %d\n", __func__, scl); - debug("%s: bit %x\n", __func__, bit); - debug("%s: scgd %x\n", __func__, scgd); - debug("%s: iccr %x\n", __func__, (scgd << (cdf_width) | bit)); - - return scgd << (cdf_width) | bit; -} - -static void -rcar_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd) -{ - struct rcar_i2c *dev = (struct rcar_i2c *)i2c_dev[adap->hwadapnr]; - u32 icccr = 0; - - /* No i2c support prior to relocation */ - if (!(gd->flags & GD_FLG_RELOC)) - return; - - /* - * reset slave mode. - * slave mode is not used on this driver - */ - writel(0, &dev->icsier); - writel(0, &dev->icsar); - writel(0, &dev->icscr); - writel(0, &dev->icssr); - - /* reset master mode */ - writel(0, &dev->icmier); - writel(0, &dev->icmcr); - writel(0, &dev->icmsr); - writel(0, &dev->icmar); - - icccr = rcar_clock_gen(adap->hwadapnr, adap->speed); - if (icccr == 0) - puts("I2C: Init failed\n"); - else - writel(icccr, &dev->icccr); -} - -static int rcar_i2c_read(struct i2c_adapter *adap, uint8_t chip, - uint addr, int alen, u8 *data, int len) -{ - struct rcar_i2c *dev = (struct rcar_i2c *)i2c_dev[adap->hwadapnr]; - int i; - - for (i = 0; i < len; i++) - data[i] = rcar_i2c_raw_read(dev, chip, addr + i); - - return 0; -} - -static int rcar_i2c_write(struct i2c_adapter *adap, uint8_t chip, uint addr, - int alen, u8 *data, int len) -{ - struct rcar_i2c *dev = (struct rcar_i2c *)i2c_dev[adap->hwadapnr]; - return rcar_i2c_raw_write(dev, chip, addr, data, len); -} - -static int -rcar_i2c_probe(struct i2c_adapter *adap, u8 dev) -{ - return rcar_i2c_read(adap, dev, 0, 0, NULL, 0); -} - -static unsigned int rcar_i2c_set_bus_speed(struct i2c_adapter *adap, - unsigned int speed) -{ - struct rcar_i2c *dev = (struct rcar_i2c *)i2c_dev[adap->hwadapnr]; - u32 icccr; - int ret = 0; - - rcar_i2c_raw_rw_finish(dev); - - icccr = rcar_clock_gen(adap->hwadapnr, speed); - if (icccr == 0) { - puts("I2C: Init failed\n"); - ret = -1; - } else { - writel(icccr, &dev->icccr); - } - return ret; -} - -/* - * Register RCAR i2c adapters - */ -U_BOOT_I2C_ADAP_COMPLETE(rcar_0, rcar_i2c_init, rcar_i2c_probe, rcar_i2c_read, - rcar_i2c_write, rcar_i2c_set_bus_speed, - CONFIG_SYS_RCAR_I2C0_SPEED, 0, 0) -U_BOOT_I2C_ADAP_COMPLETE(rcar_1, rcar_i2c_init, rcar_i2c_probe, rcar_i2c_read, - rcar_i2c_write, rcar_i2c_set_bus_speed, - CONFIG_SYS_RCAR_I2C1_SPEED, 0, 1) -U_BOOT_I2C_ADAP_COMPLETE(rcar_2, rcar_i2c_init, rcar_i2c_probe, rcar_i2c_read, - rcar_i2c_write, rcar_i2c_set_bus_speed, - CONFIG_SYS_RCAR_I2C2_SPEED, 0, 2) -U_BOOT_I2C_ADAP_COMPLETE(rcar_3, rcar_i2c_init, rcar_i2c_probe, rcar_i2c_read, - rcar_i2c_write, rcar_i2c_set_bus_speed, - CONFIG_SYS_RCAR_I2C3_SPEED, 0, 3)