forked from Minki/linux
715a223323
Currently, V4L uses a scancode table whose index is the scancode and
the value is the keycode. While this works, it has some drawbacks:
1) It requires that the scancode to be at the range 00-7f;
2) keycodes should be masked on 7 bits in order for it to work;
3) due to the 7 bits approach, sometimes it is not possible to replace
the default keyboard to another one with a different encoding rule;
4) it is different than what is done with dvb-usb approach;
5) it requires a typedef for it to work. This is not a recommended
Linux CodingStyle.
This patch is part of a larger series of IR changes. It basically
replaces the IR_KEYTAB_TYPE tables by a structured table:
struct ir_scancode {
u16 scancode;
u32 keycode;
};
This is very close to what dvb does. So, a further integration with DVB
code will be easy.
While we've changed the tables, for now, the IR keycode handling is still
based on the old approach.
The only notable effect is the redution of about 35% of the ir-common
module size:
text data bss dec hex filename
6721 29208 4 35933 8c5d old/ir-common.ko
5756 18040 4 23800 5cf8 new/ir-common.ko
In thesis, we could be using above u8 for scancode, reducing even more the size
of the module, but defining it as u16 is more convenient, since, on dvb, each
scancode has up to 16 bits, and we currently have a few troubles with rc5, as their
scancodes are defined with more than 8 bits.
This patch itself shouldn't be doing any functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
347 lines
9.9 KiB
C
347 lines
9.9 KiB
C
/*
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* cx18 I2C functions
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*
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* Derived from ivtv-i2c.c
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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* Copyright (C) 2008 Andy Walls <awalls@radix.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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#include "cx18-driver.h"
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#include "cx18-io.h"
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#include "cx18-cards.h"
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#include "cx18-gpio.h"
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#include "cx18-i2c.h"
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#include "cx18-irq.h"
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#include <media/ir-kbd-i2c.h>
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#define CX18_REG_I2C_1_WR 0xf15000
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#define CX18_REG_I2C_1_RD 0xf15008
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#define CX18_REG_I2C_2_WR 0xf25100
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#define CX18_REG_I2C_2_RD 0xf25108
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#define SETSCL_BIT 0x0001
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#define SETSDL_BIT 0x0002
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#define GETSCL_BIT 0x0004
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#define GETSDL_BIT 0x0008
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#define CX18_CS5345_I2C_ADDR 0x4c
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#define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70
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#define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71
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/* This array should match the CX18_HW_ defines */
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static const u8 hw_addrs[] = {
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0, /* CX18_HW_TUNER */
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0, /* CX18_HW_TVEEPROM */
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CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */
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0, /* CX18_HW_DVB */
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0, /* CX18_HW_418_AV */
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0, /* CX18_HW_GPIO_MUX */
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0, /* CX18_HW_GPIO_RESET_CTRL */
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CX18_Z8F0811_IR_TX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_TX_HAUP */
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CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_RX_HAUP */
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};
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/* This array should match the CX18_HW_ defines */
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/* This might well become a card-specific array */
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static const u8 hw_bus[] = {
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1, /* CX18_HW_TUNER */
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0, /* CX18_HW_TVEEPROM */
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0, /* CX18_HW_CS5345 */
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0, /* CX18_HW_DVB */
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0, /* CX18_HW_418_AV */
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0, /* CX18_HW_GPIO_MUX */
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0, /* CX18_HW_GPIO_RESET_CTRL */
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0, /* CX18_HW_Z8F0811_IR_TX_HAUP */
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0, /* CX18_HW_Z8F0811_IR_RX_HAUP */
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};
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/* This array should match the CX18_HW_ defines */
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static const char * const hw_modules[] = {
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"tuner", /* CX18_HW_TUNER */
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NULL, /* CX18_HW_TVEEPROM */
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"cs5345", /* CX18_HW_CS5345 */
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NULL, /* CX18_HW_DVB */
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NULL, /* CX18_HW_418_AV */
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NULL, /* CX18_HW_GPIO_MUX */
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NULL, /* CX18_HW_GPIO_RESET_CTRL */
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NULL, /* CX18_HW_Z8F0811_IR_TX_HAUP */
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NULL, /* CX18_HW_Z8F0811_IR_RX_HAUP */
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};
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/* This array should match the CX18_HW_ defines */
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static const char * const hw_devicenames[] = {
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"tuner",
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"tveeprom",
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"cs5345",
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"cx23418_DTV",
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"cx23418_AV",
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"gpio_mux",
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"gpio_reset_ctrl",
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"ir_tx_z8f0811_haup",
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"ir_rx_z8f0811_haup",
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};
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static int cx18_i2c_new_ir(struct i2c_adapter *adap, u32 hw, const char *type,
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u8 addr)
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{
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struct i2c_board_info info;
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struct IR_i2c_init_data ir_init_data;
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unsigned short addr_list[2] = { addr, I2C_CLIENT_END };
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memset(&info, 0, sizeof(struct i2c_board_info));
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strlcpy(info.type, type, I2C_NAME_SIZE);
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/* Our default information for ir-kbd-i2c.c to use */
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switch (hw) {
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case CX18_HW_Z8F0811_IR_RX_HAUP:
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memset(&ir_init_data, 0, sizeof(struct IR_i2c_init_data));
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ir_init_data.ir_codes = &ir_codes_hauppauge_new_table;
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ir_init_data.internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
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ir_init_data.type = IR_TYPE_RC5;
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ir_init_data.name = "CX23418 Z8F0811 Hauppauge";
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info.platform_data = &ir_init_data;
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break;
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default:
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break;
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}
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return i2c_new_probed_device(adap, &info, addr_list) == NULL ? -1 : 0;
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}
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int cx18_i2c_register(struct cx18 *cx, unsigned idx)
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{
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struct v4l2_subdev *sd;
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int bus = hw_bus[idx];
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struct i2c_adapter *adap = &cx->i2c_adap[bus];
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const char *mod = hw_modules[idx];
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const char *type = hw_devicenames[idx];
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u32 hw = 1 << idx;
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if (idx >= ARRAY_SIZE(hw_addrs))
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return -1;
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if (hw == CX18_HW_TUNER) {
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/* special tuner group handling */
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sd = v4l2_i2c_new_probed_subdev(&cx->v4l2_dev,
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adap, mod, type, cx->card_i2c->radio);
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if (sd != NULL)
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sd->grp_id = hw;
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sd = v4l2_i2c_new_probed_subdev(&cx->v4l2_dev,
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adap, mod, type, cx->card_i2c->demod);
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if (sd != NULL)
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sd->grp_id = hw;
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sd = v4l2_i2c_new_probed_subdev(&cx->v4l2_dev,
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adap, mod, type, cx->card_i2c->tv);
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if (sd != NULL)
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sd->grp_id = hw;
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return sd != NULL ? 0 : -1;
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}
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if (hw & CX18_HW_Z8F0811_IR_HAUP)
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return cx18_i2c_new_ir(adap, hw, type, hw_addrs[idx]);
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/* Is it not an I2C device or one we do not wish to register? */
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if (!hw_addrs[idx])
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return -1;
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/* It's an I2C device other than an analog tuner or IR chip */
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sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, mod, type, hw_addrs[idx]);
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if (sd != NULL)
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sd->grp_id = hw;
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return sd != NULL ? 0 : -1;
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}
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/* Find the first member of the subdev group id in hw */
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struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw)
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{
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struct v4l2_subdev *result = NULL;
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struct v4l2_subdev *sd;
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spin_lock(&cx->v4l2_dev.lock);
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v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) {
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if (sd->grp_id == hw) {
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result = sd;
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break;
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}
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}
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spin_unlock(&cx->v4l2_dev.lock);
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return result;
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}
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static void cx18_setscl(void *data, int state)
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{
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
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u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;
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u32 r = cx18_read_reg(cx, addr);
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if (state)
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cx18_write_reg(cx, r | SETSCL_BIT, addr);
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else
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cx18_write_reg(cx, r & ~SETSCL_BIT, addr);
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}
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static void cx18_setsda(void *data, int state)
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{
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
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u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;
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u32 r = cx18_read_reg(cx, addr);
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if (state)
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cx18_write_reg(cx, r | SETSDL_BIT, addr);
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else
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cx18_write_reg(cx, r & ~SETSDL_BIT, addr);
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}
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static int cx18_getscl(void *data)
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{
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
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u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;
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return cx18_read_reg(cx, addr) & GETSCL_BIT;
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}
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static int cx18_getsda(void *data)
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{
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
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u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;
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return cx18_read_reg(cx, addr) & GETSDL_BIT;
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}
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/* template for i2c-bit-algo */
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static struct i2c_adapter cx18_i2c_adap_template = {
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.name = "cx18 i2c driver",
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.algo = NULL, /* set by i2c-algo-bit */
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.algo_data = NULL, /* filled from template */
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.owner = THIS_MODULE,
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};
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#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */
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#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */
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static struct i2c_algo_bit_data cx18_i2c_algo_template = {
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.setsda = cx18_setsda,
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.setscl = cx18_setscl,
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.getsda = cx18_getsda,
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.getscl = cx18_getscl,
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.udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/
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.timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */
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};
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/* init + register i2c algo-bit adapter */
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int init_cx18_i2c(struct cx18 *cx)
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{
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int i, err;
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CX18_DEBUG_I2C("i2c init\n");
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for (i = 0; i < 2; i++) {
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/* Setup algorithm for adapter */
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memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template,
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sizeof(struct i2c_algo_bit_data));
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cx->i2c_algo_cb_data[i].cx = cx;
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cx->i2c_algo_cb_data[i].bus_index = i;
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cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i];
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/* Setup adapter */
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memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template,
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sizeof(struct i2c_adapter));
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cx->i2c_adap[i].algo_data = &cx->i2c_algo[i];
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sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name),
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" #%d-%d", cx->instance, i);
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i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev);
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cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev;
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}
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if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) {
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/* Reset/Unreset I2C hardware block */
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/* Clock select 220MHz */
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cx18_write_reg_expect(cx, 0x10000000, 0xc71004,
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0x00000000, 0x10001000);
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/* Clock Enable */
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cx18_write_reg_expect(cx, 0x10001000, 0xc71024,
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0x00001000, 0x10001000);
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}
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/* courtesy of Steven Toth <stoth@hauppauge.com> */
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cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);
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mdelay(10);
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cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0);
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mdelay(10);
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cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);
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mdelay(10);
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/* Set to edge-triggered intrs. */
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cx18_write_reg(cx, 0x00c00000, 0xc730c8);
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/* Clear any stale intrs */
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cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS,
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~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT);
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/* Hw I2C1 Clock Freq ~100kHz */
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cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR);
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cx18_setscl(&cx->i2c_algo_cb_data[0], 1);
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cx18_setsda(&cx->i2c_algo_cb_data[0], 1);
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/* Hw I2C2 Clock Freq ~100kHz */
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cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR);
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cx18_setscl(&cx->i2c_algo_cb_data[1], 1);
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cx18_setsda(&cx->i2c_algo_cb_data[1], 1);
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cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL,
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core, reset, (u32) CX18_GPIO_RESET_I2C);
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err = i2c_bit_add_bus(&cx->i2c_adap[0]);
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if (err)
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goto err;
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err = i2c_bit_add_bus(&cx->i2c_adap[1]);
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if (err)
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goto err_del_bus_0;
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return 0;
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err_del_bus_0:
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i2c_del_adapter(&cx->i2c_adap[0]);
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err:
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return err;
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}
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void exit_cx18_i2c(struct cx18 *cx)
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{
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int i;
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CX18_DEBUG_I2C("i2c exit\n");
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cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4,
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CX18_REG_I2C_1_WR);
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cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4,
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CX18_REG_I2C_2_WR);
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for (i = 0; i < 2; i++) {
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i2c_del_adapter(&cx->i2c_adap[i]);
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}
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}
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/*
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Hauppauge HVR1600 should have:
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32 cx24227
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98 unknown
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a0 eeprom
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c2 tuner
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e? zilog ir
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*/
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