summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/drivers/i2c/busses/i2c-cpm.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-cpm.c')
-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-cpm.c731
1 files changed, 0 insertions, 731 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-cpm.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-cpm.c
deleted file mode 100644
index c1e1096b..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-cpm.c
+++ /dev/null
@@ -1,731 +0,0 @@
-/*
- * Freescale CPM1/CPM2 I2C interface.
- * Copyright (c) 1999 Dan Malek (dmalek@jlc.net).
- *
- * moved into proper i2c interface;
- * Brad Parker (brad@heeltoe.com)
- *
- * Parts from dbox2_i2c.c (cvs.tuxbox.org)
- * (C) 2000-2001 Felix Domke (tmbinc@gmx.net), Gillem (htoa@gmx.net)
- *
- * (C) 2007 Montavista Software, Inc.
- * Vitaly Bordug <vitb@kernel.crashing.org>
- *
- * Converted to of_platform_device. Renamed to i2c-cpm.c.
- * (C) 2007,2008 Jochen Friedrich <jochen@scram.de>
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-#include <linux/stddef.h>
-#include <linux/i2c.h>
-#include <linux/io.h>
-#include <linux/dma-mapping.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/of_i2c.h>
-#include <sysdev/fsl_soc.h>
-#include <asm/cpm.h>
-
-/* Try to define this if you have an older CPU (earlier than rev D4) */
-/* However, better use a GPIO based bitbang driver in this case :/ */
-#undef I2C_CHIP_ERRATA
-
-#define CPM_MAX_READ 513
-#define CPM_MAXBD 4
-
-#define I2C_EB (0x10) /* Big endian mode */
-#define I2C_EB_CPM2 (0x30) /* Big endian mode, memory snoop */
-
-#define DPRAM_BASE ((u8 __iomem __force *)cpm_muram_addr(0))
-
-/* I2C parameter RAM. */
-struct i2c_ram {
- ushort rbase; /* Rx Buffer descriptor base address */
- ushort tbase; /* Tx Buffer descriptor base address */
- u_char rfcr; /* Rx function code */
- u_char tfcr; /* Tx function code */
- ushort mrblr; /* Max receive buffer length */
- uint rstate; /* Internal */
- uint rdp; /* Internal */
- ushort rbptr; /* Rx Buffer descriptor pointer */
- ushort rbc; /* Internal */
- uint rxtmp; /* Internal */
- uint tstate; /* Internal */
- uint tdp; /* Internal */
- ushort tbptr; /* Tx Buffer descriptor pointer */
- ushort tbc; /* Internal */
- uint txtmp; /* Internal */
- char res1[4]; /* Reserved */
- ushort rpbase; /* Relocation pointer */
- char res2[2]; /* Reserved */
-};
-
-#define I2COM_START 0x80
-#define I2COM_MASTER 0x01
-#define I2CER_TXE 0x10
-#define I2CER_BUSY 0x04
-#define I2CER_TXB 0x02
-#define I2CER_RXB 0x01
-#define I2MOD_EN 0x01
-
-/* I2C Registers */
-struct i2c_reg {
- u8 i2mod;
- u8 res1[3];
- u8 i2add;
- u8 res2[3];
- u8 i2brg;
- u8 res3[3];
- u8 i2com;
- u8 res4[3];
- u8 i2cer;
- u8 res5[3];
- u8 i2cmr;
-};
-
-struct cpm_i2c {
- char *base;
- struct platform_device *ofdev;
- struct i2c_adapter adap;
- uint dp_addr;
- int version; /* CPM1=1, CPM2=2 */
- int irq;
- int cp_command;
- int freq;
- struct i2c_reg __iomem *i2c_reg;
- struct i2c_ram __iomem *i2c_ram;
- u16 i2c_addr;
- wait_queue_head_t i2c_wait;
- cbd_t __iomem *tbase;
- cbd_t __iomem *rbase;
- u_char *txbuf[CPM_MAXBD];
- u_char *rxbuf[CPM_MAXBD];
- u32 txdma[CPM_MAXBD];
- u32 rxdma[CPM_MAXBD];
-};
-
-static irqreturn_t cpm_i2c_interrupt(int irq, void *dev_id)
-{
- struct cpm_i2c *cpm;
- struct i2c_reg __iomem *i2c_reg;
- struct i2c_adapter *adap = dev_id;
- int i;
-
- cpm = i2c_get_adapdata(dev_id);
- i2c_reg = cpm->i2c_reg;
-
- /* Clear interrupt. */
- i = in_8(&i2c_reg->i2cer);
- out_8(&i2c_reg->i2cer, i);
-
- dev_dbg(&adap->dev, "Interrupt: %x\n", i);
-
- wake_up(&cpm->i2c_wait);
-
- return i ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static void cpm_reset_i2c_params(struct cpm_i2c *cpm)
-{
- struct i2c_ram __iomem *i2c_ram = cpm->i2c_ram;
-
- /* Set up the I2C parameters in the parameter ram. */
- out_be16(&i2c_ram->tbase, (u8 __iomem *)cpm->tbase - DPRAM_BASE);
- out_be16(&i2c_ram->rbase, (u8 __iomem *)cpm->rbase - DPRAM_BASE);
-
- if (cpm->version == 1) {
- out_8(&i2c_ram->tfcr, I2C_EB);
- out_8(&i2c_ram->rfcr, I2C_EB);
- } else {
- out_8(&i2c_ram->tfcr, I2C_EB_CPM2);
- out_8(&i2c_ram->rfcr, I2C_EB_CPM2);
- }
-
- out_be16(&i2c_ram->mrblr, CPM_MAX_READ);
-
- out_be32(&i2c_ram->rstate, 0);
- out_be32(&i2c_ram->rdp, 0);
- out_be16(&i2c_ram->rbptr, 0);
- out_be16(&i2c_ram->rbc, 0);
- out_be32(&i2c_ram->rxtmp, 0);
- out_be32(&i2c_ram->tstate, 0);
- out_be32(&i2c_ram->tdp, 0);
- out_be16(&i2c_ram->tbptr, 0);
- out_be16(&i2c_ram->tbc, 0);
- out_be32(&i2c_ram->txtmp, 0);
-}
-
-static void cpm_i2c_force_close(struct i2c_adapter *adap)
-{
- struct cpm_i2c *cpm = i2c_get_adapdata(adap);
- struct i2c_reg __iomem *i2c_reg = cpm->i2c_reg;
-
- dev_dbg(&adap->dev, "cpm_i2c_force_close()\n");
-
- cpm_command(cpm->cp_command, CPM_CR_CLOSE_RX_BD);
-
- out_8(&i2c_reg->i2cmr, 0x00); /* Disable all interrupts */
- out_8(&i2c_reg->i2cer, 0xff);
-}
-
-static void cpm_i2c_parse_message(struct i2c_adapter *adap,
- struct i2c_msg *pmsg, int num, int tx, int rx)
-{
- cbd_t __iomem *tbdf;
- cbd_t __iomem *rbdf;
- u_char addr;
- u_char *tb;
- u_char *rb;
- struct cpm_i2c *cpm = i2c_get_adapdata(adap);
-
- tbdf = cpm->tbase + tx;
- rbdf = cpm->rbase + rx;
-
- addr = pmsg->addr << 1;
- if (pmsg->flags & I2C_M_RD)
- addr |= 1;
-
- tb = cpm->txbuf[tx];
- rb = cpm->rxbuf[rx];
-
- /* Align read buffer */
- rb = (u_char *) (((ulong) rb + 1) & ~1);
-
- tb[0] = addr; /* Device address byte w/rw flag */
-
- out_be16(&tbdf->cbd_datlen, pmsg->len + 1);
- out_be16(&tbdf->cbd_sc, 0);
-
- if (!(pmsg->flags & I2C_M_NOSTART))
- setbits16(&tbdf->cbd_sc, BD_I2C_START);
-
- if (tx + 1 == num)
- setbits16(&tbdf->cbd_sc, BD_SC_LAST | BD_SC_WRAP);
-
- if (pmsg->flags & I2C_M_RD) {
- /*
- * To read, we need an empty buffer of the proper length.
- * All that is used is the first byte for address, the remainder
- * is just used for timing (and doesn't really have to exist).
- */
-
- dev_dbg(&adap->dev, "cpm_i2c_read(abyte=0x%x)\n", addr);
-
- out_be16(&rbdf->cbd_datlen, 0);
- out_be16(&rbdf->cbd_sc, BD_SC_EMPTY | BD_SC_INTRPT);
-
- if (rx + 1 == CPM_MAXBD)
- setbits16(&rbdf->cbd_sc, BD_SC_WRAP);
-
- eieio();
- setbits16(&tbdf->cbd_sc, BD_SC_READY);
- } else {
- dev_dbg(&adap->dev, "cpm_i2c_write(abyte=0x%x)\n", addr);
-
- memcpy(tb+1, pmsg->buf, pmsg->len);
-
- eieio();
- setbits16(&tbdf->cbd_sc, BD_SC_READY | BD_SC_INTRPT);
- }
-}
-
-static int cpm_i2c_check_message(struct i2c_adapter *adap,
- struct i2c_msg *pmsg, int tx, int rx)
-{
- cbd_t __iomem *tbdf;
- cbd_t __iomem *rbdf;
- u_char *tb;
- u_char *rb;
- struct cpm_i2c *cpm = i2c_get_adapdata(adap);
-
- tbdf = cpm->tbase + tx;
- rbdf = cpm->rbase + rx;
-
- tb = cpm->txbuf[tx];
- rb = cpm->rxbuf[rx];
-
- /* Align read buffer */
- rb = (u_char *) (((uint) rb + 1) & ~1);
-
- eieio();
- if (pmsg->flags & I2C_M_RD) {
- dev_dbg(&adap->dev, "tx sc 0x%04x, rx sc 0x%04x\n",
- in_be16(&tbdf->cbd_sc), in_be16(&rbdf->cbd_sc));
-
- if (in_be16(&tbdf->cbd_sc) & BD_SC_NAK) {
- dev_dbg(&adap->dev, "I2C read; No ack\n");
- return -ENXIO;
- }
- if (in_be16(&rbdf->cbd_sc) & BD_SC_EMPTY) {
- dev_err(&adap->dev,
- "I2C read; complete but rbuf empty\n");
- return -EREMOTEIO;
- }
- if (in_be16(&rbdf->cbd_sc) & BD_SC_OV) {
- dev_err(&adap->dev, "I2C read; Overrun\n");
- return -EREMOTEIO;
- }
- memcpy(pmsg->buf, rb, pmsg->len);
- } else {
- dev_dbg(&adap->dev, "tx sc %d 0x%04x\n", tx,
- in_be16(&tbdf->cbd_sc));
-
- if (in_be16(&tbdf->cbd_sc) & BD_SC_NAK) {
- dev_dbg(&adap->dev, "I2C write; No ack\n");
- return -ENXIO;
- }
- if (in_be16(&tbdf->cbd_sc) & BD_SC_UN) {
- dev_err(&adap->dev, "I2C write; Underrun\n");
- return -EIO;
- }
- if (in_be16(&tbdf->cbd_sc) & BD_SC_CL) {
- dev_err(&adap->dev, "I2C write; Collision\n");
- return -EIO;
- }
- }
- return 0;
-}
-
-static int cpm_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
-{
- struct cpm_i2c *cpm = i2c_get_adapdata(adap);
- struct i2c_reg __iomem *i2c_reg = cpm->i2c_reg;
- struct i2c_ram __iomem *i2c_ram = cpm->i2c_ram;
- struct i2c_msg *pmsg;
- int ret, i;
- int tptr;
- int rptr;
- cbd_t __iomem *tbdf;
- cbd_t __iomem *rbdf;
-
- if (num > CPM_MAXBD)
- return -EINVAL;
-
- /* Check if we have any oversized READ requests */
- for (i = 0; i < num; i++) {
- pmsg = &msgs[i];
- if (pmsg->len >= CPM_MAX_READ)
- return -EINVAL;
- }
-
- /* Reset to use first buffer */
- out_be16(&i2c_ram->rbptr, in_be16(&i2c_ram->rbase));
- out_be16(&i2c_ram->tbptr, in_be16(&i2c_ram->tbase));
-
- tbdf = cpm->tbase;
- rbdf = cpm->rbase;
-
- tptr = 0;
- rptr = 0;
-
- while (tptr < num) {
- pmsg = &msgs[tptr];
- dev_dbg(&adap->dev, "R: %d T: %d\n", rptr, tptr);
-
- cpm_i2c_parse_message(adap, pmsg, num, tptr, rptr);
- if (pmsg->flags & I2C_M_RD)
- rptr++;
- tptr++;
- }
- /* Start transfer now */
- /* Enable RX/TX/Error interupts */
- out_8(&i2c_reg->i2cmr, I2CER_TXE | I2CER_TXB | I2CER_RXB);
- out_8(&i2c_reg->i2cer, 0xff); /* Clear interrupt status */
- /* Chip bug, set enable here */
- setbits8(&i2c_reg->i2mod, I2MOD_EN); /* Enable */
- /* Begin transmission */
- setbits8(&i2c_reg->i2com, I2COM_START);
-
- tptr = 0;
- rptr = 0;
-
- while (tptr < num) {
- /* Check for outstanding messages */
- dev_dbg(&adap->dev, "test ready.\n");
- pmsg = &msgs[tptr];
- if (pmsg->flags & I2C_M_RD)
- ret = wait_event_timeout(cpm->i2c_wait,
- (in_be16(&tbdf[tptr].cbd_sc) & BD_SC_NAK) ||
- !(in_be16(&rbdf[rptr].cbd_sc) & BD_SC_EMPTY),
- 1 * HZ);
- else
- ret = wait_event_timeout(cpm->i2c_wait,
- !(in_be16(&tbdf[tptr].cbd_sc) & BD_SC_READY),
- 1 * HZ);
- if (ret == 0) {
- ret = -EREMOTEIO;
- dev_err(&adap->dev, "I2C transfer: timeout\n");
- goto out_err;
- }
- if (ret > 0) {
- dev_dbg(&adap->dev, "ready.\n");
- ret = cpm_i2c_check_message(adap, pmsg, tptr, rptr);
- tptr++;
- if (pmsg->flags & I2C_M_RD)
- rptr++;
- if (ret)
- goto out_err;
- }
- }
-#ifdef I2C_CHIP_ERRATA
- /*
- * Chip errata, clear enable. This is not needed on rev D4 CPUs.
- * Disabling I2C too early may cause too short stop condition
- */
- udelay(4);
- clrbits8(&i2c_reg->i2mod, I2MOD_EN);
-#endif
- return (num);
-
-out_err:
- cpm_i2c_force_close(adap);
-#ifdef I2C_CHIP_ERRATA
- /*
- * Chip errata, clear enable. This is not needed on rev D4 CPUs.
- */
- clrbits8(&i2c_reg->i2mod, I2MOD_EN);
-#endif
- return ret;
-}
-
-static u32 cpm_i2c_func(struct i2c_adapter *adap)
-{
- return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
-}
-
-/* -----exported algorithm data: ------------------------------------- */
-
-static const struct i2c_algorithm cpm_i2c_algo = {
- .master_xfer = cpm_i2c_xfer,
- .functionality = cpm_i2c_func,
-};
-
-static const struct i2c_adapter cpm_ops = {
- .owner = THIS_MODULE,
- .name = "i2c-cpm",
- .algo = &cpm_i2c_algo,
-};
-
-static int __devinit cpm_i2c_setup(struct cpm_i2c *cpm)
-{
- struct platform_device *ofdev = cpm->ofdev;
- const u32 *data;
- int len, ret, i;
- void __iomem *i2c_base;
- cbd_t __iomem *tbdf;
- cbd_t __iomem *rbdf;
- unsigned char brg;
-
- dev_dbg(&cpm->ofdev->dev, "cpm_i2c_setup()\n");
-
- init_waitqueue_head(&cpm->i2c_wait);
-
- cpm->irq = of_irq_to_resource(ofdev->dev.of_node, 0, NULL);
- if (!cpm->irq)
- return -EINVAL;
-
- /* Install interrupt handler. */
- ret = request_irq(cpm->irq, cpm_i2c_interrupt, 0, "cpm_i2c",
- &cpm->adap);
- if (ret)
- return ret;
-
- /* I2C parameter RAM */
- i2c_base = of_iomap(ofdev->dev.of_node, 1);
- if (i2c_base == NULL) {
- ret = -EINVAL;
- goto out_irq;
- }
-
- if (of_device_is_compatible(ofdev->dev.of_node, "fsl,cpm1-i2c")) {
-
- /* Check for and use a microcode relocation patch. */
- cpm->i2c_ram = i2c_base;
- cpm->i2c_addr = in_be16(&cpm->i2c_ram->rpbase);
-
- /*
- * Maybe should use cpm_muram_alloc instead of hardcoding
- * this in micropatch.c
- */
- if (cpm->i2c_addr) {
- cpm->i2c_ram = cpm_muram_addr(cpm->i2c_addr);
- iounmap(i2c_base);
- }
-
- cpm->version = 1;
-
- } else if (of_device_is_compatible(ofdev->dev.of_node, "fsl,cpm2-i2c")) {
- cpm->i2c_addr = cpm_muram_alloc(sizeof(struct i2c_ram), 64);
- cpm->i2c_ram = cpm_muram_addr(cpm->i2c_addr);
- out_be16(i2c_base, cpm->i2c_addr);
- iounmap(i2c_base);
-
- cpm->version = 2;
-
- } else {
- iounmap(i2c_base);
- ret = -EINVAL;
- goto out_irq;
- }
-
- /* I2C control/status registers */
- cpm->i2c_reg = of_iomap(ofdev->dev.of_node, 0);
- if (cpm->i2c_reg == NULL) {
- ret = -EINVAL;
- goto out_ram;
- }
-
- data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
- if (!data || len != 4) {
- ret = -EINVAL;
- goto out_reg;
- }
- cpm->cp_command = *data;
-
- data = of_get_property(ofdev->dev.of_node, "linux,i2c-class", &len);
- if (data && len == 4)
- cpm->adap.class = *data;
-
- data = of_get_property(ofdev->dev.of_node, "clock-frequency", &len);
- if (data && len == 4)
- cpm->freq = *data;
- else
- cpm->freq = 60000; /* use 60kHz i2c clock by default */
-
- /*
- * Allocate space for CPM_MAXBD transmit and receive buffer
- * descriptors in the DP ram.
- */
- cpm->dp_addr = cpm_muram_alloc(sizeof(cbd_t) * 2 * CPM_MAXBD, 8);
- if (!cpm->dp_addr) {
- ret = -ENOMEM;
- goto out_reg;
- }
-
- cpm->tbase = cpm_muram_addr(cpm->dp_addr);
- cpm->rbase = cpm_muram_addr(cpm->dp_addr + sizeof(cbd_t) * CPM_MAXBD);
-
- /* Allocate TX and RX buffers */
-
- tbdf = cpm->tbase;
- rbdf = cpm->rbase;
-
- for (i = 0; i < CPM_MAXBD; i++) {
- cpm->rxbuf[i] = dma_alloc_coherent(&cpm->ofdev->dev,
- CPM_MAX_READ + 1,
- &cpm->rxdma[i], GFP_KERNEL);
- if (!cpm->rxbuf[i]) {
- ret = -ENOMEM;
- goto out_muram;
- }
- out_be32(&rbdf[i].cbd_bufaddr, ((cpm->rxdma[i] + 1) & ~1));
-
- cpm->txbuf[i] = (unsigned char *)dma_alloc_coherent(&cpm->ofdev->dev, CPM_MAX_READ + 1, &cpm->txdma[i], GFP_KERNEL);
- if (!cpm->txbuf[i]) {
- ret = -ENOMEM;
- goto out_muram;
- }
- out_be32(&tbdf[i].cbd_bufaddr, cpm->txdma[i]);
- }
-
- /* Initialize Tx/Rx parameters. */
-
- cpm_reset_i2c_params(cpm);
-
- dev_dbg(&cpm->ofdev->dev, "i2c_ram 0x%p, i2c_addr 0x%04x, freq %d\n",
- cpm->i2c_ram, cpm->i2c_addr, cpm->freq);
- dev_dbg(&cpm->ofdev->dev, "tbase 0x%04x, rbase 0x%04x\n",
- (u8 __iomem *)cpm->tbase - DPRAM_BASE,
- (u8 __iomem *)cpm->rbase - DPRAM_BASE);
-
- cpm_command(cpm->cp_command, CPM_CR_INIT_TRX);
-
- /*
- * Select an invalid address. Just make sure we don't use loopback mode
- */
- out_8(&cpm->i2c_reg->i2add, 0x7f << 1);
-
- /*
- * PDIV is set to 00 in i2mod, so brgclk/32 is used as input to the
- * i2c baud rate generator. This is divided by 2 x (DIV + 3) to get
- * the actual i2c bus frequency.
- */
- brg = get_brgfreq() / (32 * 2 * cpm->freq) - 3;
- out_8(&cpm->i2c_reg->i2brg, brg);
-
- out_8(&cpm->i2c_reg->i2mod, 0x00);
- out_8(&cpm->i2c_reg->i2com, I2COM_MASTER); /* Master mode */
-
- /* Disable interrupts. */
- out_8(&cpm->i2c_reg->i2cmr, 0);
- out_8(&cpm->i2c_reg->i2cer, 0xff);
-
- return 0;
-
-out_muram:
- for (i = 0; i < CPM_MAXBD; i++) {
- if (cpm->rxbuf[i])
- dma_free_coherent(&cpm->ofdev->dev, CPM_MAX_READ + 1,
- cpm->rxbuf[i], cpm->rxdma[i]);
- if (cpm->txbuf[i])
- dma_free_coherent(&cpm->ofdev->dev, CPM_MAX_READ + 1,
- cpm->txbuf[i], cpm->txdma[i]);
- }
- cpm_muram_free(cpm->dp_addr);
-out_reg:
- iounmap(cpm->i2c_reg);
-out_ram:
- if ((cpm->version == 1) && (!cpm->i2c_addr))
- iounmap(cpm->i2c_ram);
- if (cpm->version == 2)
- cpm_muram_free(cpm->i2c_addr);
-out_irq:
- free_irq(cpm->irq, &cpm->adap);
- return ret;
-}
-
-static void cpm_i2c_shutdown(struct cpm_i2c *cpm)
-{
- int i;
-
- /* Shut down I2C. */
- clrbits8(&cpm->i2c_reg->i2mod, I2MOD_EN);
-
- /* Disable interrupts */
- out_8(&cpm->i2c_reg->i2cmr, 0);
- out_8(&cpm->i2c_reg->i2cer, 0xff);
-
- free_irq(cpm->irq, &cpm->adap);
-
- /* Free all memory */
- for (i = 0; i < CPM_MAXBD; i++) {
- dma_free_coherent(&cpm->ofdev->dev, CPM_MAX_READ + 1,
- cpm->rxbuf[i], cpm->rxdma[i]);
- dma_free_coherent(&cpm->ofdev->dev, CPM_MAX_READ + 1,
- cpm->txbuf[i], cpm->txdma[i]);
- }
-
- cpm_muram_free(cpm->dp_addr);
- iounmap(cpm->i2c_reg);
-
- if ((cpm->version == 1) && (!cpm->i2c_addr))
- iounmap(cpm->i2c_ram);
- if (cpm->version == 2)
- cpm_muram_free(cpm->i2c_addr);
-}
-
-static int __devinit cpm_i2c_probe(struct platform_device *ofdev)
-{
- int result, len;
- struct cpm_i2c *cpm;
- const u32 *data;
-
- cpm = kzalloc(sizeof(struct cpm_i2c), GFP_KERNEL);
- if (!cpm)
- return -ENOMEM;
-
- cpm->ofdev = ofdev;
-
- dev_set_drvdata(&ofdev->dev, cpm);
-
- cpm->adap = cpm_ops;
- i2c_set_adapdata(&cpm->adap, cpm);
- cpm->adap.dev.parent = &ofdev->dev;
- cpm->adap.dev.of_node = of_node_get(ofdev->dev.of_node);
-
- result = cpm_i2c_setup(cpm);
- if (result) {
- dev_err(&ofdev->dev, "Unable to init hardware\n");
- goto out_free;
- }
-
- /* register new adapter to i2c module... */
-
- data = of_get_property(ofdev->dev.of_node, "linux,i2c-index", &len);
- cpm->adap.nr = (data && len == 4) ? be32_to_cpup(data) : -1;
- result = i2c_add_numbered_adapter(&cpm->adap);
-
- if (result < 0) {
- dev_err(&ofdev->dev, "Unable to register with I2C\n");
- goto out_shut;
- }
-
- dev_dbg(&ofdev->dev, "hw routines for %s registered.\n",
- cpm->adap.name);
-
- /*
- * register OF I2C devices
- */
- of_i2c_register_devices(&cpm->adap);
-
- return 0;
-out_shut:
- cpm_i2c_shutdown(cpm);
-out_free:
- dev_set_drvdata(&ofdev->dev, NULL);
- kfree(cpm);
-
- return result;
-}
-
-static int __devexit cpm_i2c_remove(struct platform_device *ofdev)
-{
- struct cpm_i2c *cpm = dev_get_drvdata(&ofdev->dev);
-
- i2c_del_adapter(&cpm->adap);
-
- cpm_i2c_shutdown(cpm);
-
- dev_set_drvdata(&ofdev->dev, NULL);
- kfree(cpm);
-
- return 0;
-}
-
-static const struct of_device_id cpm_i2c_match[] = {
- {
- .compatible = "fsl,cpm1-i2c",
- },
- {
- .compatible = "fsl,cpm2-i2c",
- },
- {},
-};
-
-MODULE_DEVICE_TABLE(of, cpm_i2c_match);
-
-static struct platform_driver cpm_i2c_driver = {
- .probe = cpm_i2c_probe,
- .remove = __devexit_p(cpm_i2c_remove),
- .driver = {
- .name = "fsl-i2c-cpm",
- .owner = THIS_MODULE,
- .of_match_table = cpm_i2c_match,
- },
-};
-
-module_platform_driver(cpm_i2c_driver);
-
-MODULE_AUTHOR("Jochen Friedrich <jochen@scram.de>");
-MODULE_DESCRIPTION("I2C-Bus adapter routines for CPM boards");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-03-30 20:02:42 +0000