MIPS: SEAD3: Nuke I2C driver that never was wired up in Makefile.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/mti-sead3/sead3-i2c-drv.c b/arch/mips/mti-sead3/sead3-i2c-drv.c
deleted file mode 100644 (file)
index a43b050..0000000
--- a/arch/mips/mti-sead3/sead3-i2c-drv.c
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
- * Copyright (C) 2015 Imagination Technologies, Inc.
- */
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/platform_device.h>
-
-#include <asm/mips-boards/sead3-addr.h>
-
-#define PIC32_I2CxCON          0x0000
-#define         PIC32_I2CCON_ON        (1<<15)
-#define         PIC32_I2CCON_ACKDT     (1<<5)
-#define         PIC32_I2CCON_ACKEN     (1<<4)
-#define         PIC32_I2CCON_RCEN      (1<<3)
-#define         PIC32_I2CCON_PEN       (1<<2)
-#define         PIC32_I2CCON_RSEN      (1<<1)
-#define         PIC32_I2CCON_SEN       (1<<0)
-#define PIC32_I2CxCONCLR       0x0004
-#define PIC32_I2CxCONSET       0x0008
-#define PIC32_I2CxSTAT         0x0010
-#define PIC32_I2CxSTATCLR      0x0014
-#define         PIC32_I2CSTAT_ACKSTAT  (1<<15)
-#define         PIC32_I2CSTAT_TRSTAT   (1<<14)
-#define         PIC32_I2CSTAT_BCL      (1<<10)
-#define         PIC32_I2CSTAT_IWCOL    (1<<7)
-#define         PIC32_I2CSTAT_I2COV    (1<<6)
-#define PIC32_I2CxBRG          0x0040
-#define PIC32_I2CxTRN          0x0050
-#define PIC32_I2CxRCV          0x0060
-
-static DEFINE_SPINLOCK(pic32_bus_lock);
-
-static void __iomem *bus_xfer  = (void __iomem *)SEAD3_PIC32_REGISTERS;
-static void __iomem *bus_status = (void __iomem *)SEAD3_PI_PIC32_USB_STATUS;
-
-#define DELAY() udelay(100)
-
-static inline unsigned int ioready(void)
-{
-       return readl(bus_status) & SEAD3_PI_PIC32_USB_STATUS_IO_RDY;
-}
-
-static inline void wait_ioready(void)
-{
-       do { } while (!ioready());
-}
-
-static inline void wait_ioclear(void)
-{
-       do { } while (ioready());
-}
-
-static inline void check_ioclear(void)
-{
-       if (ioready()) {
-               do {
-                       (void) readl(bus_xfer);
-                       DELAY();
-               } while (ioready());
-       }
-}
-
-static u32 pic32_bus_readl(u32 reg)
-{
-       unsigned long flags;
-       u32 status, val;
-
-       spin_lock_irqsave(&pic32_bus_lock, flags);
-
-       check_ioclear();
-       writel((0x01 << 24) | (reg & 0x00ffffff), bus_xfer);
-       DELAY();
-       wait_ioready();
-       status = readl(bus_xfer);
-       DELAY();
-       val = readl(bus_xfer);
-       wait_ioclear();
-
-       spin_unlock_irqrestore(&pic32_bus_lock, flags);
-
-       return val;
-}
-
-static void pic32_bus_writel(u32 val, u32 reg)
-{
-       unsigned long flags;
-       u32 status;
-
-       spin_lock_irqsave(&pic32_bus_lock, flags);
-
-       check_ioclear();
-       writel((0x10 << 24) | (reg & 0x00ffffff), bus_xfer);
-       DELAY();
-       writel(val, bus_xfer);
-       DELAY();
-       wait_ioready();
-       status = readl(bus_xfer);
-       wait_ioclear();
-
-       spin_unlock_irqrestore(&pic32_bus_lock, flags);
-}
-
-struct pic32_i2c_platform_data {
-       u32     base;
-       struct i2c_adapter adap;
-       u32     xfer_timeout;
-       u32     ack_timeout;
-       u32     ctl_timeout;
-};
-
-static inline void pic32_i2c_start(struct pic32_i2c_platform_data *adap)
-{
-       pic32_bus_writel(PIC32_I2CCON_SEN, adap->base + PIC32_I2CxCONSET);
-}
-
-static inline void pic32_i2c_stop(struct pic32_i2c_platform_data *adap)
-{
-       pic32_bus_writel(PIC32_I2CCON_PEN, adap->base + PIC32_I2CxCONSET);
-}
-
-static inline void pic32_i2c_ack(struct pic32_i2c_platform_data *adap)
-{
-       pic32_bus_writel(PIC32_I2CCON_ACKDT, adap->base + PIC32_I2CxCONCLR);
-       pic32_bus_writel(PIC32_I2CCON_ACKEN, adap->base + PIC32_I2CxCONSET);
-}
-
-static inline void pic32_i2c_nack(struct pic32_i2c_platform_data *adap)
-{
-       pic32_bus_writel(PIC32_I2CCON_ACKDT, adap->base + PIC32_I2CxCONSET);
-       pic32_bus_writel(PIC32_I2CCON_ACKEN, adap->base + PIC32_I2CxCONSET);
-}
-
-static inline int pic32_i2c_idle(struct pic32_i2c_platform_data *adap)
-{
-       int i;
-
-       for (i = 0; i < adap->ctl_timeout; i++) {
-               if (((pic32_bus_readl(adap->base + PIC32_I2CxCON) &
-                     (PIC32_I2CCON_ACKEN | PIC32_I2CCON_RCEN |
-                      PIC32_I2CCON_PEN | PIC32_I2CCON_RSEN |
-                      PIC32_I2CCON_SEN)) == 0) &&
-                   ((pic32_bus_readl(adap->base + PIC32_I2CxSTAT) &
-                     (PIC32_I2CSTAT_TRSTAT)) == 0))
-                       return 0;
-               udelay(1);
-       }
-       return -ETIMEDOUT;
-}
-
-static inline u32 pic32_i2c_master_write(struct pic32_i2c_platform_data *adap,
-               u32 byte)
-{
-       pic32_bus_writel(byte, adap->base + PIC32_I2CxTRN);
-       return pic32_bus_readl(adap->base + PIC32_I2CxSTAT) &
-                       PIC32_I2CSTAT_IWCOL;
-}
-
-static inline u32 pic32_i2c_master_read(struct pic32_i2c_platform_data *adap)
-{
-       pic32_bus_writel(PIC32_I2CCON_RCEN, adap->base + PIC32_I2CxCONSET);
-       while (pic32_bus_readl(adap->base + PIC32_I2CxCON) & PIC32_I2CCON_RCEN)
-               ;
-       pic32_bus_writel(PIC32_I2CSTAT_I2COV, adap->base + PIC32_I2CxSTATCLR);
-       return pic32_bus_readl(adap->base + PIC32_I2CxRCV);
-}
-
-static int pic32_i2c_address(struct pic32_i2c_platform_data *adap,
-               unsigned int addr, int rd)
-{
-       pic32_i2c_idle(adap);
-       pic32_i2c_start(adap);
-       pic32_i2c_idle(adap);
-
-       addr <<= 1;
-       if (rd)
-               addr |= 1;
-
-       if (pic32_i2c_master_write(adap, addr))
-               return -EIO;
-       pic32_i2c_idle(adap);
-       if (pic32_bus_readl(adap->base + PIC32_I2CxSTAT) &
-                       PIC32_I2CSTAT_ACKSTAT)
-               return -EIO;
-       return 0;
-}
-
-static int sead3_i2c_read(struct pic32_i2c_platform_data *adap,
-               unsigned char *buf, unsigned int len)
-{
-       u32 data;
-       int i;
-
-       i = 0;
-       while (i < len) {
-               data = pic32_i2c_master_read(adap);
-               buf[i++] = data;
-               if (i < len)
-                       pic32_i2c_ack(adap);
-               else
-                       pic32_i2c_nack(adap);
-       }
-
-       pic32_i2c_stop(adap);
-       pic32_i2c_idle(adap);
-       return 0;
-}
-
-static int sead3_i2c_write(struct pic32_i2c_platform_data *adap,
-               unsigned char *buf, unsigned int len)
-{
-       int i;
-       u32 data;
-
-       i = 0;
-       while (i < len) {
-               data = buf[i];
-               if (pic32_i2c_master_write(adap, data))
-                       return -EIO;
-               pic32_i2c_idle(adap);
-               if (pic32_bus_readl(adap->base + PIC32_I2CxSTAT) &
-                                       PIC32_I2CSTAT_ACKSTAT)
-                       return -EIO;
-               i++;
-       }
-
-       pic32_i2c_stop(adap);
-       pic32_i2c_idle(adap);
-       return 0;
-}
-
-static int sead3_pic32_platform_xfer(struct i2c_adapter *i2c_adap,
-               struct i2c_msg *msgs, int num)
-{
-       struct pic32_i2c_platform_data *adap = i2c_adap->algo_data;
-       struct i2c_msg *p;
-       int i, err = 0;
-
-       for (i = 0; i < num; i++) {
-#define __BUFSIZE 80
-               int ii;
-               static char buf[__BUFSIZE];
-               char *b = buf;
-
-               p = &msgs[i];
-               b += sprintf(buf, " [%d bytes]", p->len);
-               if ((p->flags & I2C_M_RD) == 0) {
-                       for (ii = 0; ii < p->len; ii++) {
-                               if (b < &buf[__BUFSIZE-4]) {
-                                       b += sprintf(b, " %02x", p->buf[ii]);
-                               } else {
-                                       strcat(b, "...");
-                                       break;
-                               }
-                       }
-               }
-       }
-
-       for (i = 0; !err && i < num; i++) {
-               p = &msgs[i];
-               err = pic32_i2c_address(adap, p->addr, p->flags & I2C_M_RD);
-               if (err || !p->len)
-                       continue;
-               if (p->flags & I2C_M_RD)
-                       err = sead3_i2c_read(adap, p->buf, p->len);
-               else
-                       err = sead3_i2c_write(adap, p->buf, p->len);
-       }
-
-       /* Return the number of messages processed, or the error code. */
-       if (err == 0)
-               err = num;
-
-       return err;
-}
-
-static u32 sead3_pic32_platform_func(struct i2c_adapter *adap)
-{
-       return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
-static const struct i2c_algorithm sead3_platform_algo = {
-       .master_xfer    = sead3_pic32_platform_xfer,
-       .functionality  = sead3_pic32_platform_func,
-};
-
-static void sead3_i2c_platform_setup(struct pic32_i2c_platform_data *priv)
-{
-       pic32_bus_writel(500, priv->base + PIC32_I2CxBRG);
-       pic32_bus_writel(PIC32_I2CCON_ON, priv->base + PIC32_I2CxCONCLR);
-       pic32_bus_writel(PIC32_I2CCON_ON, priv->base + PIC32_I2CxCONSET);
-       pic32_bus_writel(PIC32_I2CSTAT_BCL | PIC32_I2CSTAT_IWCOL,
-               priv->base + PIC32_I2CxSTATCLR);
-}
-
-static int sead3_i2c_platform_probe(struct platform_device *pdev)
-{
-       struct pic32_i2c_platform_data *priv;
-       struct resource *r;
-       int ret;
-
-       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!r) {
-               ret = -ENODEV;
-               goto out;
-       }
-
-       priv = kzalloc(sizeof(struct pic32_i2c_platform_data), GFP_KERNEL);
-       if (!priv) {
-               ret = -ENOMEM;
-               goto out;
-       }
-
-       priv->base = r->start;
-       if (!priv->base) {
-               ret = -EBUSY;
-               goto out_mem;
-       }
-
-       priv->xfer_timeout = 200;
-       priv->ack_timeout = 200;
-       priv->ctl_timeout = 200;
-
-       priv->adap.nr = pdev->id;
-       priv->adap.algo = &sead3_platform_algo;
-       priv->adap.algo_data = priv;
-       priv->adap.dev.parent = &pdev->dev;
-       strlcpy(priv->adap.name, "SEAD3 PIC32", sizeof(priv->adap.name));
-
-       sead3_i2c_platform_setup(priv);
-
-       ret = i2c_add_numbered_adapter(&priv->adap);
-       if (ret == 0) {
-               platform_set_drvdata(pdev, priv);
-               return 0;
-       }
-
-out_mem:
-       kfree(priv);
-out:
-       return ret;
-}
-
-static int sead3_i2c_platform_remove(struct platform_device *pdev)
-{
-       struct pic32_i2c_platform_data *priv = platform_get_drvdata(pdev);
-
-       platform_set_drvdata(pdev, NULL);
-       i2c_del_adapter(&priv->adap);
-       kfree(priv);
-       return 0;
-}
-
-#ifdef CONFIG_PM
-static int sead3_i2c_platform_suspend(struct platform_device *pdev,
-               pm_message_t state)
-{
-       dev_dbg(&pdev->dev, "i2c_platform_disable\n");
-       return 0;
-}
-
-static int sead3_i2c_platform_resume(struct platform_device *pdev)
-{
-       struct pic32_i2c_platform_data *priv = platform_get_drvdata(pdev);
-
-       dev_dbg(&pdev->dev, "sead3_i2c_platform_setup\n");
-       sead3_i2c_platform_setup(priv);
-
-       return 0;
-}
-#else
-#define sead3_i2c_platform_suspend     NULL
-#define sead3_i2c_platform_resume      NULL
-#endif
-
-static struct platform_driver sead3_i2c_platform_driver = {
-       .driver = {
-               .name   = "sead3-i2c",
-       },
-       .probe          = sead3_i2c_platform_probe,
-       .remove         = sead3_i2c_platform_remove,
-       .suspend        = sead3_i2c_platform_suspend,
-       .resume         = sead3_i2c_platform_resume,
-};
-
-module_platform_driver(sead3_i2c_platform_driver);
-
-MODULE_AUTHOR("Chris Dearman, MIPS Technologies INC.");
-MODULE_DESCRIPTION("SEAD3 PIC32 I2C driver");
-MODULE_LICENSE("GPL");