diff options
Diffstat (limited to 'target/linux/lantiq/patches/0011-MIPS-lantiq-adds-falcon-I2C.patch')
| -rw-r--r-- | target/linux/lantiq/patches/0011-MIPS-lantiq-adds-falcon-I2C.patch | 890 |
1 files changed, 0 insertions, 890 deletions
diff --git a/target/linux/lantiq/patches/0011-MIPS-lantiq-adds-falcon-I2C.patch b/target/linux/lantiq/patches/0011-MIPS-lantiq-adds-falcon-I2C.patch deleted file mode 100644 index eceb1e4f2..000000000 --- a/target/linux/lantiq/patches/0011-MIPS-lantiq-adds-falcon-I2C.patch +++ /dev/null @@ -1,890 +0,0 @@ -From 6437f41dfdf9475178e22ab0dd886af033f90cc2 Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Thu, 29 Sep 2011 21:10:16 +0200 -Subject: [PATCH 11/24] MIPS: lantiq: adds falcon I2C - ---- - arch/mips/lantiq/falcon/devices.c | 21 + - arch/mips/lantiq/falcon/devices.h | 1 + - drivers/i2c/busses/Kconfig | 4 + - drivers/i2c/busses/Makefile | 1 + - drivers/i2c/busses/i2c-falcon.c | 815 +++++++++++++++++++++++++++++++++++++ - 5 files changed, 842 insertions(+), 0 deletions(-) - create mode 100644 drivers/i2c/busses/i2c-falcon.c - ---- a/arch/mips/lantiq/falcon/devices.c -+++ b/arch/mips/lantiq/falcon/devices.c -@@ -126,3 +126,24 @@ falcon_register_gpio_extra(void) - ltq_sysctl_activate(SYSCTL_SYS1, - ACTS_PADCTRL3 | ACTS_PADCTRL4 | ACTS_P3 | ACTS_P4); - } -+ -+/* i2c */ -+static struct resource falcon_i2c_resources[] = { -+ MEM_RES("i2c", GPON_I2C_BASE,GPON_I2C_END), -+ IRQ_RES("i2c_lb", FALCON_IRQ_I2C_LBREQ), -+ IRQ_RES("i2c_b", FALCON_IRQ_I2C_BREQ), -+ IRQ_RES("i2c_err", FALCON_IRQ_I2C_I2C_ERR), -+ IRQ_RES("i2c_p", FALCON_IRQ_I2C_I2C_P), -+}; -+ -+void __init falcon_register_i2c(void) -+{ -+ platform_device_register_simple("i2c-falcon", 0, -+ falcon_i2c_resources, ARRAY_SIZE(falcon_i2c_resources)); -+ sys1_hw_activate(ACTS_I2C_ACT); -+} -+ -+void __init falcon_register_crypto(void) -+{ -+ platform_device_register_simple("ltq_falcon_deu", 0, NULL, 0); -+} ---- a/arch/mips/lantiq/falcon/devices.h -+++ b/arch/mips/lantiq/falcon/devices.h -@@ -16,5 +16,6 @@ - extern void falcon_register_nand(void); - extern void falcon_register_gpio(void); - extern void falcon_register_gpio_extra(void); -+extern void falcon_register_i2c(void); - - #endif ---- a/drivers/i2c/busses/Kconfig -+++ b/drivers/i2c/busses/Kconfig -@@ -284,6 +284,10 @@ config I2C_POWERMAC - - comment "I2C system bus drivers (mostly embedded / system-on-chip)" - -+config I2C_FALCON -+ tristate "Falcon I2C interface" -+# depends on SOC_FALCON -+ - config I2C_AT91 - tristate "Atmel AT91 I2C Two-Wire interface (TWI)" - depends on ARCH_AT91 && EXPERIMENTAL && BROKEN ---- a/drivers/i2c/busses/Makefile -+++ b/drivers/i2c/busses/Makefile -@@ -82,5 +82,6 @@ obj-$(CONFIG_I2C_SIBYTE) += i2c-sibyte.o - obj-$(CONFIG_I2C_STUB) += i2c-stub.o - obj-$(CONFIG_SCx200_ACB) += scx200_acb.o - obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o -+obj-$(CONFIG_I2C_FALCON) += i2c-falcon.o - - ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG ---- /dev/null -+++ b/drivers/i2c/busses/i2c-falcon.c -@@ -0,0 +1,815 @@ -+/* -+ * Lantiq FALC(tm) ON - I2C bus adapter -+ * -+ * Parts based on i2c-designware.c and other i2c drivers from Linux 2.6.33 -+ * -+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA. -+ */ -+ -+/* #define DEBUG */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/delay.h> -+#include <linux/slab.h> /* for kzalloc, kfree */ -+#include <linux/i2c.h> -+#include <linux/clk.h> -+#include <linux/errno.h> -+#include <linux/sched.h> -+#include <linux/err.h> -+#include <linux/interrupt.h> -+#include <linux/platform_device.h> -+#include <linux/io.h> -+#include <linux/gpio.h> -+ -+#include <falcon/lantiq_soc.h> -+ -+/* CURRENT ISSUES: -+ * - no high speed support -+ * - supports only master mode -+ * - ten bit mode is not tested (no slave devices) -+ */ -+ -+/* mapping for access macros */ -+#define reg_r32(reg) __raw_readl(reg) -+#define reg_w32(val, reg) __raw_writel(val, reg) -+#define reg_w32_mask(clear, set, reg) \ -+ reg_w32((reg_r32(reg) & ~(clear)) | (set), reg) -+#define reg_r32_table(reg, idx) reg_r32(&((uint32_t *)®)[idx]) -+#define reg_w32_table(val, reg, idx) reg_w32(val, &((uint32_t *)®)[idx]) -+#define i2c (priv->membase) -+#include <falcon/i2c_reg.h> -+ -+#define DRV_NAME "i2c-falcon" -+#define DRV_VERSION "1.01" -+ -+#define FALCON_I2C_BUSY_TIMEOUT 20 /* ms */ -+ -+#ifdef DEBUG -+#define FALCON_I2C_XFER_TIMEOUT 25*HZ -+#else -+#define FALCON_I2C_XFER_TIMEOUT HZ -+#endif -+#if defined(DEBUG) && 0 -+#define PRINTK(arg...) printk(arg) -+#else -+#define PRINTK(arg...) do {} while (0) -+#endif -+ -+#define FALCON_I2C_IMSC_DEFAULT_MASK (I2C_IMSC_I2C_P_INT_EN | \ -+ I2C_IMSC_I2C_ERR_INT_EN) -+ -+#define FALCON_I2C_ARB_LOST (1 << 0) -+#define FALCON_I2C_NACK (1 << 1) -+#define FALCON_I2C_RX_UFL (1 << 2) -+#define FALCON_I2C_RX_OFL (1 << 3) -+#define FALCON_I2C_TX_UFL (1 << 4) -+#define FALCON_I2C_TX_OFL (1 << 5) -+ -+struct falcon_i2c { -+ struct mutex mutex; -+ -+ enum { -+ FALCON_I2C_MODE_100 = 1, -+ FALCON_I2C_MODE_400 = 2, -+ FALCON_I2C_MODE_3400 = 3 -+ } mode; /* current speed mode */ -+ -+ struct clk *clk; /* clock input for i2c hardware block */ -+ struct gpon_reg_i2c __iomem *membase; /* base of mapped registers */ -+ int irq_lb, irq_b, irq_err, irq_p; /* last burst, burst, error, -+ protocol IRQs */ -+ -+ struct i2c_adapter adap; -+ struct device *dev; -+ -+ struct completion cmd_complete; -+ -+ /* message transfer data */ -+ /* current message */ -+ struct i2c_msg *current_msg; -+ /* number of messages to handle */ -+ int msgs_num; -+ /* current buffer */ -+ u8 *msg_buf; -+ /* remaining length of current buffer */ -+ u32 msg_buf_len; -+ /* error status of the current transfer */ -+ int msg_err; -+ -+ /* master status codes */ -+ enum { -+ STATUS_IDLE, -+ STATUS_ADDR, /* address phase */ -+ STATUS_WRITE, -+ STATUS_READ, -+ STATUS_READ_END, -+ STATUS_STOP -+ } status; -+}; -+ -+static irqreturn_t falcon_i2c_isr(int irq, void *dev_id); -+ -+static inline void enable_burst_irq(struct falcon_i2c *priv) -+{ -+ i2c_w32_mask(0, I2C_IMSC_LBREQ_INT_EN | I2C_IMSC_BREQ_INT_EN, imsc); -+} -+static inline void disable_burst_irq(struct falcon_i2c *priv) -+{ -+ i2c_w32_mask(I2C_IMSC_LBREQ_INT_EN | I2C_IMSC_BREQ_INT_EN, 0, imsc); -+} -+ -+static void prepare_msg_send_addr(struct falcon_i2c *priv) -+{ -+ struct i2c_msg *msg = priv->current_msg; -+ int rd = !!(msg->flags & I2C_M_RD); /* extends to 0 or 1 */ -+ u16 addr = msg->addr; -+ -+ /* new i2c_msg */ -+ priv->msg_buf = msg->buf; -+ priv->msg_buf_len = msg->len; -+ if (rd) -+ priv->status = STATUS_READ; -+ else -+ priv->status = STATUS_WRITE; -+ -+ /* send slave address */ -+ if (msg->flags & I2C_M_TEN) { -+ i2c_w32(0xf0 | ((addr & 0x300) >> 7) | rd, txd); -+ i2c_w32(addr & 0xff, txd); -+ } else -+ i2c_w32((addr & 0x7f) << 1 | rd, txd); -+} -+ -+static void set_tx_len(struct falcon_i2c *priv) -+{ -+ struct i2c_msg *msg = priv->current_msg; -+ int len = (msg->flags & I2C_M_TEN) ? 2 : 1; -+ -+ PRINTK("set_tx_len %cX\n", (msg->flags & I2C_M_RD)?'R':'T'); -+ -+ priv->status = STATUS_ADDR; -+ -+ if (!(msg->flags & I2C_M_RD)) { -+ len += msg->len; -+ } else { -+ /* set maximum received packet size (before rx int!) */ -+ i2c_w32(msg->len, mrps_ctrl); -+ } -+ i2c_w32(len, tps_ctrl); -+ enable_burst_irq(priv); -+} -+ -+static int falcon_i2c_hw_init(struct i2c_adapter *adap) -+{ -+ struct falcon_i2c *priv = i2c_get_adapdata(adap); -+ -+ /* disable bus */ -+ i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl); -+ -+#ifndef DEBUG -+ /* set normal operation clock divider */ -+ i2c_w32(1 << I2C_CLC_RMC_OFFSET, clc); -+#else -+ /* for debugging a higher divider value! */ -+ i2c_w32(0xF0 << I2C_CLC_RMC_OFFSET, clc); -+#endif -+ -+ /* set frequency */ -+ if (priv->mode == FALCON_I2C_MODE_100) { -+ dev_dbg(priv->dev, "set standard mode (100 kHz)\n"); -+ i2c_w32(0, fdiv_high_cfg); -+ i2c_w32((1 << I2C_FDIV_CFG_INC_OFFSET) | -+ (499 << I2C_FDIV_CFG_DEC_OFFSET), -+ fdiv_cfg); -+ } else if (priv->mode == FALCON_I2C_MODE_400) { -+ dev_dbg(priv->dev, "set fast mode (400 kHz)\n"); -+ i2c_w32(0, fdiv_high_cfg); -+ i2c_w32((1 << I2C_FDIV_CFG_INC_OFFSET) | -+ (124 << I2C_FDIV_CFG_DEC_OFFSET), -+ fdiv_cfg); -+ } else if (priv->mode == FALCON_I2C_MODE_3400) { -+ dev_dbg(priv->dev, "set high mode (3.4 MHz)\n"); -+ i2c_w32(0, fdiv_cfg); -+ /* TODO recalculate value for 100MHz input */ -+ i2c_w32((41 << I2C_FDIV_HIGH_CFG_INC_OFFSET) | -+ (152 << I2C_FDIV_HIGH_CFG_DEC_OFFSET), -+ fdiv_high_cfg); -+ } else { -+ dev_warn(priv->dev, "unknown mode\n"); -+ return -ENODEV; -+ } -+ -+ /* configure fifo */ -+ i2c_w32(I2C_FIFO_CFG_TXFC | /* tx fifo as flow controller */ -+ I2C_FIFO_CFG_RXFC | /* rx fifo as flow controller */ -+ I2C_FIFO_CFG_TXFA_TXFA2 | /* tx fifo 4-byte aligned */ -+ I2C_FIFO_CFG_RXFA_RXFA2 | /* rx fifo 4-byte aligned */ -+ I2C_FIFO_CFG_TXBS_TXBS0 | /* tx fifo burst size is 1 word */ -+ I2C_FIFO_CFG_RXBS_RXBS0, /* rx fifo burst size is 1 word */ -+ fifo_cfg); -+ -+ /* configure address */ -+ i2c_w32(I2C_ADDR_CFG_SOPE_EN | /* generate stop when no more data in the -+ fifo */ -+ I2C_ADDR_CFG_SONA_EN | /* generate stop when NA received */ -+ I2C_ADDR_CFG_MnS_EN | /* we are master device */ -+ 0, /* our slave address (not used!) */ -+ addr_cfg); -+ -+ /* enable bus */ -+ i2c_w32_mask(0, I2C_RUN_CTRL_RUN_EN, run_ctrl); -+ -+ return 0; -+} -+ -+static int falcon_i2c_wait_bus_not_busy(struct falcon_i2c *priv) -+{ -+ int timeout = FALCON_I2C_BUSY_TIMEOUT; -+ -+ while ((i2c_r32(bus_stat) & I2C_BUS_STAT_BS_MASK) -+ != I2C_BUS_STAT_BS_FREE) { -+ if (timeout <= 0) { -+ dev_warn(priv->dev, "timeout waiting for bus ready\n"); -+ return -ETIMEDOUT; -+ } -+ timeout--; -+ mdelay(1); -+ } -+ -+ return 0; -+} -+ -+static void falcon_i2c_tx(struct falcon_i2c *priv, int last) -+{ -+ if (priv->msg_buf_len && priv->msg_buf) { -+ i2c_w32(*priv->msg_buf, txd); -+ -+ if (--priv->msg_buf_len) -+ priv->msg_buf++; -+ else -+ priv->msg_buf = NULL; -+ } else -+ last = 1; -+ -+ if (last) { -+ disable_burst_irq(priv); -+ } -+} -+ -+static void falcon_i2c_rx(struct falcon_i2c *priv, int last) -+{ -+ u32 fifo_stat,timeout; -+ if (priv->msg_buf_len && priv->msg_buf) { -+ timeout = 5000000; -+ do { -+ fifo_stat = i2c_r32(ffs_stat); -+ } while (!fifo_stat && --timeout); -+ if (!timeout) { -+ last = 1; -+ PRINTK("\nrx timeout\n"); -+ goto err; -+ } -+ while (fifo_stat) { -+ *priv->msg_buf = i2c_r32(rxd); -+ if (--priv->msg_buf_len) -+ priv->msg_buf++; -+ else { -+ priv->msg_buf = NULL; -+ last = 1; -+ break; -+ } -+ #if 0 -+ fifo_stat = i2c_r32(ffs_stat); -+ #else -+ /* do not read more than burst size, otherwise no "last -+ burst" is generated and the transaction is blocked! */ -+ fifo_stat = 0; -+ #endif -+ } -+ } else { -+ last = 1; -+ } -+err: -+ if (last) { -+ disable_burst_irq(priv); -+ -+ if (priv->status == STATUS_READ_END) { -+ /* do the STATUS_STOP and complete() here, as sometimes -+ the tx_end is already seen before this is finished */ -+ priv->status = STATUS_STOP; -+ complete(&priv->cmd_complete); -+ } else { -+ i2c_w32(I2C_ENDD_CTRL_SETEND, endd_ctrl); -+ priv->status = STATUS_READ_END; -+ } -+ } -+} -+ -+static void falcon_i2c_xfer_init(struct falcon_i2c *priv) -+{ -+ /* enable interrupts */ -+ i2c_w32(FALCON_I2C_IMSC_DEFAULT_MASK, imsc); -+ -+ /* trigger transfer of first msg */ -+ set_tx_len(priv); -+} -+ -+static void dump_msgs(struct i2c_msg msgs[], int num, int rx) -+{ -+#if defined(DEBUG) -+ int i, j; -+ printk("Messages %d %s\n", num, rx ? "out" : "in"); -+ for (i = 0; i < num; i++) { -+ printk("%2d %cX Msg(%d) addr=0x%X: ", i, -+ (msgs[i].flags & I2C_M_RD)?'R':'T', -+ msgs[i].len, msgs[i].addr); -+ if (!(msgs[i].flags & I2C_M_RD) || rx) { -+ for (j = 0; j < msgs[i].len; j++) -+ printk("%02X ", msgs[i].buf[j]); -+ } -+ printk("\n"); -+ } -+#endif -+} -+ -+static void falcon_i2c_release_bus(struct falcon_i2c *priv) -+{ -+ if ((i2c_r32(bus_stat) & I2C_BUS_STAT_BS_MASK) == I2C_BUS_STAT_BS_BM) -+ i2c_w32(I2C_ENDD_CTRL_SETEND, endd_ctrl); -+} -+ -+static int falcon_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], -+ int num) -+{ -+ struct falcon_i2c *priv = i2c_get_adapdata(adap); -+ int ret; -+ -+ dev_dbg(priv->dev, "xfer %u messages\n", num); -+ dump_msgs(msgs, num, 0); -+ -+ mutex_lock(&priv->mutex); -+ -+ INIT_COMPLETION(priv->cmd_complete); -+ priv->current_msg = msgs; -+ priv->msgs_num = num; -+ priv->msg_err = 0; -+ priv->status = STATUS_IDLE; -+ -+ /* wait for the bus to become ready */ -+ ret = falcon_i2c_wait_bus_not_busy(priv); -+ if (ret) -+ goto done; -+ -+ while (priv->msgs_num) { -+ /* start the transfers */ -+ falcon_i2c_xfer_init(priv); -+ -+ /* wait for transfers to complete */ -+ ret = wait_for_completion_interruptible_timeout( -+ &priv->cmd_complete, FALCON_I2C_XFER_TIMEOUT); -+ if (ret == 0) { -+ dev_err(priv->dev, "controller timed out\n"); -+ falcon_i2c_hw_init(adap); -+ ret = -ETIMEDOUT; -+ goto done; -+ } else if (ret < 0) -+ goto done; -+ -+ if (priv->msg_err) { -+ if (priv->msg_err & FALCON_I2C_NACK) -+ ret = -ENXIO; -+ else -+ ret = -EREMOTEIO; -+ goto done; -+ } -+ if (--priv->msgs_num) { -+ priv->current_msg++; -+ } -+ } -+ /* no error? */ -+ ret = num; -+ -+done: -+ falcon_i2c_release_bus(priv); -+ -+ mutex_unlock(&priv->mutex); -+ -+ if (ret>=0) -+ dump_msgs(msgs, num, 1); -+ -+ PRINTK("XFER ret %d\n", ret); -+ return ret; -+} -+ -+static irqreturn_t falcon_i2c_isr_burst(int irq, void *dev_id) -+{ -+ struct falcon_i2c *priv = dev_id; -+ struct i2c_msg *msg = priv->current_msg; -+ int last = (irq == priv->irq_lb); -+ -+ if (last) -+ PRINTK("LB "); -+ else -+ PRINTK("B "); -+ -+ if (msg->flags & I2C_M_RD) { -+ switch (priv->status) { -+ case STATUS_ADDR: -+ PRINTK("X"); -+ prepare_msg_send_addr(priv); -+ disable_burst_irq(priv); -+ break; -+ case STATUS_READ: -+ case STATUS_READ_END: -+ PRINTK("R"); -+ falcon_i2c_rx(priv, last); -+ break; -+ default: -+ disable_burst_irq(priv); -+ printk("Status R %d\n", priv->status); -+ break; -+ } -+ } else { -+ switch (priv->status) { -+ case STATUS_ADDR: -+ PRINTK("x"); -+ prepare_msg_send_addr(priv); -+ break; -+ case STATUS_WRITE: -+ PRINTK("w"); -+ falcon_i2c_tx(priv, last); -+ break; -+ default: -+ disable_burst_irq(priv); -+ printk("Status W %d\n", priv->status); -+ break; -+ } -+ } -+ -+ i2c_w32(I2C_ICR_BREQ_INT_CLR | I2C_ICR_LBREQ_INT_CLR, icr); -+ return IRQ_HANDLED; -+} -+ -+static void falcon_i2c_isr_prot(struct falcon_i2c *priv) -+{ -+ u32 i_pro = i2c_r32(p_irqss); -+ -+ PRINTK("i2c-p"); -+ -+ /* not acknowledge */ -+ if (i_pro & I2C_P_IRQSS_NACK) { -+ priv->msg_err |= FALCON_I2C_NACK; -+ PRINTK(" nack"); -+ } -+ -+ /* arbitration lost */ -+ if (i_pro & I2C_P_IRQSS_AL) { -+ priv->msg_err |= FALCON_I2C_ARB_LOST; -+ PRINTK(" arb-lost"); -+ } -+ /* tx -> rx switch */ -+ if (i_pro & I2C_P_IRQSS_RX) -+ PRINTK(" rx"); -+ -+ /* tx end */ -+ if (i_pro & I2C_P_IRQSS_TX_END) -+ PRINTK(" txend"); -+ PRINTK("\n"); -+ -+ if (!priv->msg_err) { -+ /* tx -> rx switch */ -+ if (i_pro & I2C_P_IRQSS_RX) { -+ priv->status = STATUS_READ; -+ enable_burst_irq(priv); -+ } -+ if (i_pro & I2C_P_IRQSS_TX_END) { -+ if (priv->status == STATUS_READ) -+ priv->status = STATUS_READ_END; -+ else { -+ disable_burst_irq(priv); -+ priv->status = STATUS_STOP; -+ } -+ } -+ } -+ -+ i2c_w32(i_pro, p_irqsc); -+} -+ -+static irqreturn_t falcon_i2c_isr(int irq, void *dev_id) -+{ -+ u32 i_raw, i_err=0; -+ struct falcon_i2c *priv = dev_id; -+ -+ i_raw = i2c_r32(mis); -+ PRINTK("i_raw 0x%08X\n", i_raw); -+ -+ /* error interrupt */ -+ if (i_raw & I2C_RIS_I2C_ERR_INT_INTOCC) { -+ i_err = i2c_r32(err_irqss); -+ PRINTK("i_err 0x%08X bus_stat 0x%04X\n", -+ i_err, i2c_r32(bus_stat)); -+ -+ /* tx fifo overflow (8) */ -+ if (i_err & I2C_ERR_IRQSS_TXF_OFL) -+ priv->msg_err |= FALCON_I2C_TX_OFL; -+ -+ /* tx fifo underflow (4) */ -+ if (i_err & I2C_ERR_IRQSS_TXF_UFL) -+ priv->msg_err |= FALCON_I2C_TX_UFL; -+ -+ /* rx fifo overflow (2) */ -+ if (i_err & I2C_ERR_IRQSS_RXF_OFL) -+ priv->msg_err |= FALCON_I2C_RX_OFL; -+ -+ /* rx fifo underflow (1) */ -+ if (i_err & I2C_ERR_IRQSS_RXF_UFL) -+ priv->msg_err |= FALCON_I2C_RX_UFL; -+ -+ i2c_w32(i_err, err_irqsc); -+ } -+ -+ /* protocol interrupt */ -+ if (i_raw & I2C_RIS_I2C_P_INT_INTOCC) -+ falcon_i2c_isr_prot(priv); -+ -+ if ((priv->msg_err) || (priv->status == STATUS_STOP)) -+ complete(&priv->cmd_complete); -+ -+ return IRQ_HANDLED; -+} -+ -+static u32 falcon_i2c_functionality(struct i2c_adapter *adap) -+{ -+ return I2C_FUNC_I2C | -+ I2C_FUNC_10BIT_ADDR | -+ I2C_FUNC_SMBUS_EMUL; -+} -+ -+static struct i2c_algorithm falcon_i2c_algorithm = { -+ .master_xfer = falcon_i2c_xfer, -+ .functionality = falcon_i2c_functionality, -+}; -+ -+static int __devinit falcon_i2c_probe(struct platform_device *pdev) -+{ -+ int ret = 0; -+ struct falcon_i2c *priv; -+ struct i2c_adapter *adap; -+ struct resource *mmres, *ioarea, -+ *irqres_lb, *irqres_b, *irqres_err, *irqres_p; -+ struct clk *clk; -+ -+ dev_dbg(&pdev->dev, "probing\n"); -+ -+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ irqres_lb = platform_get_resource_byname(pdev, IORESOURCE_IRQ, -+ "i2c_lb"); -+ irqres_b = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "i2c_b"); -+ irqres_err = platform_get_resource_byname(pdev, IORESOURCE_IRQ, -+ "i2c_err"); -+ irqres_p = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "i2c_p"); -+ -+ if (!mmres || !irqres_lb || !irqres_b || !irqres_err || !irqres_p) { -+ dev_err(&pdev->dev, "no resources\n"); -+ return -ENODEV; -+ } -+ -+ clk = clk_get(&pdev->dev, "fpi"); -+ if (IS_ERR(clk)) { -+ dev_err(&pdev->dev, "failed to get fpi clk\n"); -+ return -ENOENT; -+ } -+ -+ if (clk_get_rate(clk) != 100000000) { -+ dev_err(&pdev->dev, "input clock is not 100MHz\n"); -+ return -ENOENT; -+ } -+ -+ /* allocate private data */ -+ priv = kzalloc(sizeof(*priv), GFP_KERNEL); -+ if (!priv) { -+ dev_err(&pdev->dev, "can't allocate private data\n"); -+ return -ENOMEM; -+ } -+ -+ adap = &priv->adap; -+ i2c_set_adapdata(adap, priv); -+ adap->owner = THIS_MODULE; -+ adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; -+ strlcpy(adap->name, DRV_NAME "-adapter", sizeof(adap->name)); -+ adap->algo = &falcon_i2c_algorithm; -+ -+ priv->mode = FALCON_I2C_MODE_100; -+ priv->clk = clk; -+ priv->dev = &pdev->dev; -+ -+ init_completion(&priv->cmd_complete); -+ mutex_init(&priv->mutex); -+ -+ ret = ltq_gpio_request(107, 0, 0, 0, DRV_NAME":sda"); -+ if (ret) { -+ dev_err(&pdev->dev, "I2C gpio 107 (sda) not available\n"); -+ ret = -ENXIO; -+ goto err_free_priv; -+ } -+ ret = ltq_gpio_request(108, 0, 0, 0, DRV_NAME":scl"); -+ if (ret) { -+ gpio_free(107); -+ dev_err(&pdev->dev, "I2C gpio 108 (scl) not available\n"); -+ ret = -ENXIO; -+ goto err_free_priv; -+ } -+ -+ ioarea = request_mem_region(mmres->start, resource_size(mmres), -+ pdev->name); -+ -+ if (ioarea == NULL) { -+ dev_err(&pdev->dev, "I2C region already claimed\n"); -+ ret = -ENXIO; -+ goto err_free_gpio; -+ } -+ -+ /* map memory */ -+ priv->membase = ioremap_nocache(mmres->start & ~KSEG1, -+ resource_size(mmres)); -+ if (priv->membase == NULL) { -+ ret = -ENOMEM; -+ goto err_release_region; -+ } -+ -+ priv->irq_lb = irqres_lb->start; -+ ret = request_irq(priv->irq_lb, falcon_i2c_isr_burst, IRQF_DISABLED, -+ irqres_lb->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get last burst IRQ %d\n", irqres_lb->start); -+ ret = -ENODEV; -+ goto err_unmap_mem; -+ } -+ -+ priv->irq_b = irqres_b->start; -+ ret = request_irq(priv->irq_b, falcon_i2c_isr_burst, IRQF_DISABLED, -+ irqres_b->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get burst IRQ %d\n", irqres_b->start); -+ ret = -ENODEV; -+ goto err_free_lb_irq; -+ } -+ -+ priv->irq_err = irqres_err->start; -+ ret = request_irq(priv->irq_err, falcon_i2c_isr, IRQF_DISABLED, -+ irqres_err->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get error IRQ %d\n", irqres_err->start); -+ ret = -ENODEV; -+ goto err_free_b_irq; -+ } -+ -+ priv->irq_p = irqres_p->start; -+ ret = request_irq(priv->irq_p, falcon_i2c_isr, IRQF_DISABLED, -+ irqres_p->name, priv); -+ if (ret) { -+ dev_err(&pdev->dev, "can't get protocol IRQ %d\n", irqres_p->start); -+ ret = -ENODEV; -+ goto err_free_err_irq; -+ } -+ -+ dev_dbg(&pdev->dev, "mapped io-space to %p\n", priv->membase); -+ dev_dbg(&pdev->dev, "use IRQs %d, %d, %d, %d\n", irqres_lb->start, -+ irqres_b->start, irqres_err->start, irqres_p->start); -+ -+ /* add our adapter to the i2c stack */ -+ ret = i2c_add_numbered_adapter(adap); -+ if (ret) { -+ dev_err(&pdev->dev, "can't register I2C adapter\n"); -+ goto err_free_p_irq; -+ } -+ -+ platform_set_drvdata(pdev, priv); -+ i2c_set_adapdata(adap, priv); -+ -+ /* print module version information */ -+ dev_dbg(&pdev->dev, "module id=%u revision=%u\n", -+ (i2c_r32(id) & I2C_ID_ID_MASK) >> I2C_ID_ID_OFFSET, -+ (i2c_r32(id) & I2C_ID_REV_MASK) >> I2C_ID_REV_OFFSET); -+ -+ /* initialize HW */ -+ ret = falcon_i2c_hw_init(adap); -+ if (ret) { -+ dev_err(&pdev->dev, "can't configure adapter\n"); -+ goto err_remove_adapter; -+ } -+ -+ dev_info(&pdev->dev, "version %s\n", DRV_VERSION); -+ -+ return 0; -+ -+err_remove_adapter: -+ i2c_del_adapter(adap); -+ platform_set_drvdata(pdev, NULL); -+ -+err_free_p_irq: -+ free_irq(priv->irq_p, priv); -+ -+err_free_err_irq: -+ free_irq(priv->irq_err, priv); -+ -+err_free_b_irq: -+ free_irq(priv->irq_b, priv); -+ -+err_free_lb_irq: -+ free_irq(priv->irq_lb, priv); -+ -+err_unmap_mem: -+ iounmap(priv->membase); -+ -+err_release_region: -+ release_mem_region(mmres->start, resource_size(mmres)); -+ -+err_free_gpio: -+ gpio_free(108); -+ gpio_free(107); -+ -+err_free_priv: -+ kfree(priv); -+ -+ return ret; -+} -+ -+static int __devexit falcon_i2c_remove(struct platform_device *pdev) -+{ -+ struct falcon_i2c *priv = platform_get_drvdata(pdev); -+ struct resource *mmres; -+ -+ /* disable bus */ -+ i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl); -+ -+ /* remove driver */ -+ platform_set_drvdata(pdev, NULL); -+ i2c_del_adapter(&priv->adap); -+ -+ free_irq(priv->irq_lb, priv); -+ free_irq(priv->irq_b, priv); -+ free_irq(priv->irq_err, priv); -+ free_irq(priv->irq_p, priv); -+ -+ iounmap(priv->membase); -+ -+ gpio_free(108); -+ gpio_free(107); -+ -+ kfree(priv); -+ -+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ release_mem_region(mmres->start, resource_size(mmres)); -+ -+ dev_dbg(&pdev->dev, "removed\n"); -+ -+ return 0; -+} -+ -+static struct platform_driver falcon_i2c_driver = { -+ .probe = falcon_i2c_probe, -+ .remove = __devexit_p(falcon_i2c_remove), -+ .driver = { -+ .name = DRV_NAME, -+ .owner = THIS_MODULE, -+ }, -+}; -+ -+static int __init falcon_i2c_init(void) -+{ -+ int ret; -+ -+ ret = platform_driver_register(&falcon_i2c_driver); -+ -+ if (ret) -+ pr_debug(DRV_NAME ": can't register platform driver\n"); -+ -+ return ret; -+} -+ -+static void __exit falcon_i2c_exit(void) -+{ -+ platform_driver_unregister(&falcon_i2c_driver); -+} -+ -+module_init(falcon_i2c_init); -+module_exit(falcon_i2c_exit); -+ -+MODULE_DESCRIPTION("Lantiq FALC(tm) ON - I2C bus adapter"); -+MODULE_ALIAS("platform:" DRV_NAME); -+MODULE_LICENSE("GPL"); -+MODULE_VERSION(DRV_VERSION); |