mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 01:28:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
609
drivers/i2c/busses/scx200_acb.c
Normal file
609
drivers/i2c/busses/scx200_acb.c
Normal file
|
|
@ -0,0 +1,609 @@
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/*
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Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
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National Semiconductor SCx200 ACCESS.bus support
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Also supports the AMD CS5535 and AMD CS5536
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Based on i2c-keywest.c which is:
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Copyright (c) 2001 Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Copyright (c) 2000 Philip Edelbrock <phil@stimpy.netroedge.com>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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General Public License for more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/scx200.h>
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MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
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MODULE_DESCRIPTION("NatSemi SCx200 ACCESS.bus Driver");
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MODULE_ALIAS("platform:cs5535-smb");
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MODULE_LICENSE("GPL");
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#define MAX_DEVICES 4
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static int base[MAX_DEVICES] = { 0x820, 0x840 };
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module_param_array(base, int, NULL, 0);
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MODULE_PARM_DESC(base, "Base addresses for the ACCESS.bus controllers");
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#define POLL_TIMEOUT (HZ/5)
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enum scx200_acb_state {
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state_idle,
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state_address,
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state_command,
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state_repeat_start,
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state_quick,
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state_read,
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state_write,
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};
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static const char *scx200_acb_state_name[] = {
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"idle",
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"address",
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"command",
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"repeat_start",
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"quick",
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"read",
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"write",
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};
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/* Physical interface */
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struct scx200_acb_iface {
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struct scx200_acb_iface *next;
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struct i2c_adapter adapter;
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unsigned base;
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struct mutex mutex;
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/* State machine data */
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enum scx200_acb_state state;
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int result;
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u8 address_byte;
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u8 command;
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u8 *ptr;
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char needs_reset;
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unsigned len;
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};
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/* Register Definitions */
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#define ACBSDA (iface->base + 0)
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#define ACBST (iface->base + 1)
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#define ACBST_SDAST 0x40 /* SDA Status */
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#define ACBST_BER 0x20
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#define ACBST_NEGACK 0x10 /* Negative Acknowledge */
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#define ACBST_STASTR 0x08 /* Stall After Start */
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#define ACBST_MASTER 0x02
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#define ACBCST (iface->base + 2)
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#define ACBCST_BB 0x02
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#define ACBCTL1 (iface->base + 3)
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#define ACBCTL1_STASTRE 0x80
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#define ACBCTL1_NMINTE 0x40
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#define ACBCTL1_ACK 0x10
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#define ACBCTL1_STOP 0x02
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#define ACBCTL1_START 0x01
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#define ACBADDR (iface->base + 4)
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#define ACBCTL2 (iface->base + 5)
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#define ACBCTL2_ENABLE 0x01
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/************************************************************************/
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static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
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{
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const char *errmsg;
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dev_dbg(&iface->adapter.dev, "state %s, status = 0x%02x\n",
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scx200_acb_state_name[iface->state], status);
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if (status & ACBST_BER) {
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errmsg = "bus error";
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goto error;
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}
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if (!(status & ACBST_MASTER)) {
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errmsg = "not master";
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goto error;
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}
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if (status & ACBST_NEGACK) {
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dev_dbg(&iface->adapter.dev, "negative ack in state %s\n",
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scx200_acb_state_name[iface->state]);
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iface->state = state_idle;
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iface->result = -ENXIO;
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outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
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outb(ACBST_STASTR | ACBST_NEGACK, ACBST);
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/* Reset the status register */
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outb(0, ACBST);
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return;
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}
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switch (iface->state) {
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case state_idle:
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dev_warn(&iface->adapter.dev, "interrupt in idle state\n");
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break;
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case state_address:
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/* Do a pointer write first */
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outb(iface->address_byte & ~1, ACBSDA);
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iface->state = state_command;
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break;
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case state_command:
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outb(iface->command, ACBSDA);
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if (iface->address_byte & 1)
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iface->state = state_repeat_start;
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else
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iface->state = state_write;
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break;
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case state_repeat_start:
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outb(inb(ACBCTL1) | ACBCTL1_START, ACBCTL1);
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/* fallthrough */
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case state_quick:
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if (iface->address_byte & 1) {
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if (iface->len == 1)
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outb(inb(ACBCTL1) | ACBCTL1_ACK, ACBCTL1);
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else
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outb(inb(ACBCTL1) & ~ACBCTL1_ACK, ACBCTL1);
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outb(iface->address_byte, ACBSDA);
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iface->state = state_read;
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} else {
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outb(iface->address_byte, ACBSDA);
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iface->state = state_write;
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}
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break;
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case state_read:
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/* Set ACK if _next_ byte will be the last one */
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if (iface->len == 2)
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outb(inb(ACBCTL1) | ACBCTL1_ACK, ACBCTL1);
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else
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outb(inb(ACBCTL1) & ~ACBCTL1_ACK, ACBCTL1);
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if (iface->len == 1) {
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iface->result = 0;
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iface->state = state_idle;
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outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
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}
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*iface->ptr++ = inb(ACBSDA);
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--iface->len;
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break;
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case state_write:
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if (iface->len == 0) {
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iface->result = 0;
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iface->state = state_idle;
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outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
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break;
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}
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outb(*iface->ptr++, ACBSDA);
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--iface->len;
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break;
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}
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return;
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error:
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dev_err(&iface->adapter.dev,
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"%s in state %s (addr=0x%02x, len=%d, status=0x%02x)\n", errmsg,
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scx200_acb_state_name[iface->state], iface->address_byte,
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iface->len, status);
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iface->state = state_idle;
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iface->result = -EIO;
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iface->needs_reset = 1;
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}
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static void scx200_acb_poll(struct scx200_acb_iface *iface)
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{
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u8 status;
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unsigned long timeout;
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timeout = jiffies + POLL_TIMEOUT;
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while (1) {
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status = inb(ACBST);
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/* Reset the status register to avoid the hang */
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outb(0, ACBST);
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if ((status & (ACBST_SDAST|ACBST_BER|ACBST_NEGACK)) != 0) {
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scx200_acb_machine(iface, status);
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return;
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}
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if (time_after(jiffies, timeout))
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break;
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cpu_relax();
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cond_resched();
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}
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dev_err(&iface->adapter.dev, "timeout in state %s\n",
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scx200_acb_state_name[iface->state]);
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iface->state = state_idle;
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iface->result = -EIO;
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iface->needs_reset = 1;
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}
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static void scx200_acb_reset(struct scx200_acb_iface *iface)
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{
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/* Disable the ACCESS.bus device and Configure the SCL
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frequency: 16 clock cycles */
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outb(0x70, ACBCTL2);
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/* Polling mode */
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outb(0, ACBCTL1);
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/* Disable slave address */
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outb(0, ACBADDR);
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/* Enable the ACCESS.bus device */
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outb(inb(ACBCTL2) | ACBCTL2_ENABLE, ACBCTL2);
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/* Free STALL after START */
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outb(inb(ACBCTL1) & ~(ACBCTL1_STASTRE | ACBCTL1_NMINTE), ACBCTL1);
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/* Send a STOP */
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outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
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/* Clear BER, NEGACK and STASTR bits */
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outb(ACBST_BER | ACBST_NEGACK | ACBST_STASTR, ACBST);
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/* Clear BB bit */
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outb(inb(ACBCST) | ACBCST_BB, ACBCST);
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}
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static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter,
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u16 address, unsigned short flags,
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char rw, u8 command, int size,
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union i2c_smbus_data *data)
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{
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struct scx200_acb_iface *iface = i2c_get_adapdata(adapter);
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int len;
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u8 *buffer;
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u16 cur_word;
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int rc;
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switch (size) {
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case I2C_SMBUS_QUICK:
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len = 0;
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buffer = NULL;
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break;
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case I2C_SMBUS_BYTE:
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len = 1;
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buffer = rw ? &data->byte : &command;
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break;
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case I2C_SMBUS_BYTE_DATA:
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len = 1;
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buffer = &data->byte;
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break;
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case I2C_SMBUS_WORD_DATA:
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len = 2;
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cur_word = cpu_to_le16(data->word);
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buffer = (u8 *)&cur_word;
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break;
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||||
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||||
case I2C_SMBUS_I2C_BLOCK_DATA:
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||||
len = data->block[0];
|
||||
if (len == 0 || len > I2C_SMBUS_BLOCK_MAX)
|
||||
return -EINVAL;
|
||||
buffer = &data->block[1];
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||||
break;
|
||||
|
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default:
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return -EINVAL;
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}
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|
||||
dev_dbg(&adapter->dev,
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||||
"size=%d, address=0x%x, command=0x%x, len=%d, read=%d\n",
|
||||
size, address, command, len, rw);
|
||||
|
||||
if (!len && rw == I2C_SMBUS_READ) {
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||||
dev_dbg(&adapter->dev, "zero length read\n");
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||||
return -EINVAL;
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||||
}
|
||||
|
||||
mutex_lock(&iface->mutex);
|
||||
|
||||
iface->address_byte = (address << 1) | rw;
|
||||
iface->command = command;
|
||||
iface->ptr = buffer;
|
||||
iface->len = len;
|
||||
iface->result = -EINVAL;
|
||||
iface->needs_reset = 0;
|
||||
|
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outb(inb(ACBCTL1) | ACBCTL1_START, ACBCTL1);
|
||||
|
||||
if (size == I2C_SMBUS_QUICK || size == I2C_SMBUS_BYTE)
|
||||
iface->state = state_quick;
|
||||
else
|
||||
iface->state = state_address;
|
||||
|
||||
while (iface->state != state_idle)
|
||||
scx200_acb_poll(iface);
|
||||
|
||||
if (iface->needs_reset)
|
||||
scx200_acb_reset(iface);
|
||||
|
||||
rc = iface->result;
|
||||
|
||||
mutex_unlock(&iface->mutex);
|
||||
|
||||
if (rc == 0 && size == I2C_SMBUS_WORD_DATA && rw == I2C_SMBUS_READ)
|
||||
data->word = le16_to_cpu(cur_word);
|
||||
|
||||
#ifdef DEBUG
|
||||
dev_dbg(&adapter->dev, "transfer done, result: %d", rc);
|
||||
if (buffer) {
|
||||
int i;
|
||||
printk(" data:");
|
||||
for (i = 0; i < len; ++i)
|
||||
printk(" %02x", buffer[i]);
|
||||
}
|
||||
printk("\n");
|
||||
#endif
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static u32 scx200_acb_func(struct i2c_adapter *adapter)
|
||||
{
|
||||
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
|
||||
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
|
||||
I2C_FUNC_SMBUS_I2C_BLOCK;
|
||||
}
|
||||
|
||||
/* For now, we only handle combined mode (smbus) */
|
||||
static const struct i2c_algorithm scx200_acb_algorithm = {
|
||||
.smbus_xfer = scx200_acb_smbus_xfer,
|
||||
.functionality = scx200_acb_func,
|
||||
};
|
||||
|
||||
static struct scx200_acb_iface *scx200_acb_list;
|
||||
static DEFINE_MUTEX(scx200_acb_list_mutex);
|
||||
|
||||
static int scx200_acb_probe(struct scx200_acb_iface *iface)
|
||||
{
|
||||
u8 val;
|
||||
|
||||
/* Disable the ACCESS.bus device and Configure the SCL
|
||||
frequency: 16 clock cycles */
|
||||
outb(0x70, ACBCTL2);
|
||||
|
||||
if (inb(ACBCTL2) != 0x70) {
|
||||
pr_debug("ACBCTL2 readback failed\n");
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
outb(inb(ACBCTL1) | ACBCTL1_NMINTE, ACBCTL1);
|
||||
|
||||
val = inb(ACBCTL1);
|
||||
if (val) {
|
||||
pr_debug("disabled, but ACBCTL1=0x%02x\n", val);
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
outb(inb(ACBCTL2) | ACBCTL2_ENABLE, ACBCTL2);
|
||||
|
||||
outb(inb(ACBCTL1) | ACBCTL1_NMINTE, ACBCTL1);
|
||||
|
||||
val = inb(ACBCTL1);
|
||||
if ((val & ACBCTL1_NMINTE) != ACBCTL1_NMINTE) {
|
||||
pr_debug("enabled, but NMINTE won't be set, ACBCTL1=0x%02x\n",
|
||||
val);
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct scx200_acb_iface *scx200_create_iface(const char *text,
|
||||
struct device *dev, int index)
|
||||
{
|
||||
struct scx200_acb_iface *iface;
|
||||
struct i2c_adapter *adapter;
|
||||
|
||||
iface = kzalloc(sizeof(*iface), GFP_KERNEL);
|
||||
if (!iface)
|
||||
return NULL;
|
||||
|
||||
adapter = &iface->adapter;
|
||||
i2c_set_adapdata(adapter, iface);
|
||||
snprintf(adapter->name, sizeof(adapter->name), "%s ACB%d", text, index);
|
||||
adapter->owner = THIS_MODULE;
|
||||
adapter->algo = &scx200_acb_algorithm;
|
||||
adapter->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
|
||||
adapter->dev.parent = dev;
|
||||
|
||||
mutex_init(&iface->mutex);
|
||||
|
||||
return iface;
|
||||
}
|
||||
|
||||
static int scx200_acb_create(struct scx200_acb_iface *iface)
|
||||
{
|
||||
struct i2c_adapter *adapter;
|
||||
int rc;
|
||||
|
||||
adapter = &iface->adapter;
|
||||
|
||||
rc = scx200_acb_probe(iface);
|
||||
if (rc) {
|
||||
pr_warn("probe failed\n");
|
||||
return rc;
|
||||
}
|
||||
|
||||
scx200_acb_reset(iface);
|
||||
|
||||
if (i2c_add_adapter(adapter) < 0) {
|
||||
pr_err("failed to register\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (!adapter->dev.parent) {
|
||||
/* If there's no dev, we're tracking (ISA) ifaces manually */
|
||||
mutex_lock(&scx200_acb_list_mutex);
|
||||
iface->next = scx200_acb_list;
|
||||
scx200_acb_list = iface;
|
||||
mutex_unlock(&scx200_acb_list_mutex);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct scx200_acb_iface *scx200_create_dev(const char *text,
|
||||
unsigned long base, int index, struct device *dev)
|
||||
{
|
||||
struct scx200_acb_iface *iface;
|
||||
int rc;
|
||||
|
||||
iface = scx200_create_iface(text, dev, index);
|
||||
|
||||
if (iface == NULL)
|
||||
return NULL;
|
||||
|
||||
if (!request_region(base, 8, iface->adapter.name)) {
|
||||
pr_err("can't allocate io 0x%lx-0x%lx\n", base, base + 8 - 1);
|
||||
goto errout_free;
|
||||
}
|
||||
|
||||
iface->base = base;
|
||||
rc = scx200_acb_create(iface);
|
||||
|
||||
if (rc == 0)
|
||||
return iface;
|
||||
|
||||
release_region(base, 8);
|
||||
errout_free:
|
||||
kfree(iface);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int scx200_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct scx200_acb_iface *iface;
|
||||
struct resource *res;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "can't fetch device resource info\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
iface = scx200_create_dev("CS5535", res->start, 0, &pdev->dev);
|
||||
if (!iface)
|
||||
return -EIO;
|
||||
|
||||
dev_info(&pdev->dev, "SCx200 device '%s' registered\n",
|
||||
iface->adapter.name);
|
||||
platform_set_drvdata(pdev, iface);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void scx200_cleanup_iface(struct scx200_acb_iface *iface)
|
||||
{
|
||||
i2c_del_adapter(&iface->adapter);
|
||||
release_region(iface->base, 8);
|
||||
kfree(iface);
|
||||
}
|
||||
|
||||
static int scx200_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct scx200_acb_iface *iface;
|
||||
|
||||
iface = platform_get_drvdata(pdev);
|
||||
scx200_cleanup_iface(iface);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver scx200_pci_driver = {
|
||||
.driver = {
|
||||
.name = "cs5535-smb",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = scx200_probe,
|
||||
.remove = scx200_remove,
|
||||
};
|
||||
|
||||
static const struct pci_device_id scx200_isa[] = {
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) },
|
||||
{ 0, }
|
||||
};
|
||||
|
||||
static __init void scx200_scan_isa(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (!pci_dev_present(scx200_isa))
|
||||
return;
|
||||
|
||||
for (i = 0; i < MAX_DEVICES; ++i) {
|
||||
if (base[i] == 0)
|
||||
continue;
|
||||
|
||||
/* XXX: should we care about failures? */
|
||||
scx200_create_dev("SCx200", base[i], i, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
static int __init scx200_acb_init(void)
|
||||
{
|
||||
pr_debug("NatSemi SCx200 ACCESS.bus Driver\n");
|
||||
|
||||
/* First scan for ISA-based devices */
|
||||
scx200_scan_isa(); /* XXX: should we care about errors? */
|
||||
|
||||
/* If at least one bus was created, init must succeed */
|
||||
if (scx200_acb_list)
|
||||
return 0;
|
||||
|
||||
/* No ISA devices; register the platform driver for PCI-based devices */
|
||||
return platform_driver_register(&scx200_pci_driver);
|
||||
}
|
||||
|
||||
static void __exit scx200_acb_cleanup(void)
|
||||
{
|
||||
struct scx200_acb_iface *iface;
|
||||
|
||||
platform_driver_unregister(&scx200_pci_driver);
|
||||
|
||||
mutex_lock(&scx200_acb_list_mutex);
|
||||
while ((iface = scx200_acb_list) != NULL) {
|
||||
scx200_acb_list = iface->next;
|
||||
mutex_unlock(&scx200_acb_list_mutex);
|
||||
|
||||
scx200_cleanup_iface(iface);
|
||||
|
||||
mutex_lock(&scx200_acb_list_mutex);
|
||||
}
|
||||
mutex_unlock(&scx200_acb_list_mutex);
|
||||
}
|
||||
|
||||
module_init(scx200_acb_init);
|
||||
module_exit(scx200_acb_cleanup);
|
||||
Loading…
Add table
Add a link
Reference in a new issue