projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 09ea33e5 IL |
1 | /* |
| 2 | * Driver for Silicon Labs C8051F300 microcontroller. | |
| 3 | * | |
| 4 | * It is used for LNB power control in TeVii S470, | |
| 5 | * TBS 6920 PCIe DVB-S2 cards. | |
| 6 | * | |
| 7 | * Microcontroller connected to cx23885 GPIO pins: | |
| 8 | * GPIO0 - data - P0.3 F300 | |
| 9 | * GPIO1 - reset - P0.2 F300 | |
| 10 | * GPIO2 - clk - P0.1 F300 | |
| 11 | * GPIO3 - busy - P0.0 F300 | |
| 12 | * | |
| 13 | * Copyright (C) 2009 Igor M. Liplianin <liplianin@me.by> | |
| 14 | * | |
| 15 | * This program is free software; you can redistribute it and/or modify | |
| 16 | * it under the terms of the GNU General Public License as published by | |
| 17 | * the Free Software Foundation; either version 2 of the License, or | |
| 18 | * (at your option) any later version. | |
| 19 | * | |
| 20 | * This program is distributed in the hope that it will be useful, | |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 23 | * | |
| 24 | * GNU General Public License for more details. | |
| 25 | * | |
| 26 | * You should have received a copy of the GNU General Public License | |
| 27 | * along with this program; if not, write to the Free Software | |
| 28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 29 | */ | |
| 30 | ||
| 31 | #include "cx23885.h" | |
| 32 | ||
| 33 | #define F300_DATA GPIO_0 | |
| 34 | #define F300_RESET GPIO_1 | |
| 35 | #define F300_CLK GPIO_2 | |
| 36 | #define F300_BUSY GPIO_3 | |
| 37 | ||
| 38 | static void f300_set_line(struct cx23885_dev *dev, u32 line, u8 lvl) | |
| 39 | { | |
| 40 | cx23885_gpio_enable(dev, line, 1); | |
| 41 | if (lvl == 1) | |
| 42 | cx23885_gpio_set(dev, line); | |
| 43 | else | |
| 44 | cx23885_gpio_clear(dev, line); | |
| 45 | } | |
| 46 | ||
| 47 | static u8 f300_get_line(struct cx23885_dev *dev, u32 line) | |
| 48 | { | |
| 49 | cx23885_gpio_enable(dev, line, 0); | |
| 50 | ||
| 51 | return cx23885_gpio_get(dev, line); | |
| 52 | } | |
| 53 | ||
| 54 | static void f300_send_byte(struct cx23885_dev *dev, u8 dta) | |
| 55 | { | |
| 56 | u8 i; | |
| 57 | ||
| 58 | for (i = 0; i < 8; i++) { | |
| 59 | f300_set_line(dev, F300_CLK, 0); | |
| 60 | udelay(30); | |
| 61 | f300_set_line(dev, F300_DATA, (dta & 0x80) >> 7);/* msb first */ | |
| 62 | udelay(30); | |
| 63 | dta <<= 1; | |
| 64 | f300_set_line(dev, F300_CLK, 1); | |
| 65 | udelay(30); | |
| 66 | } | |
| 67 | } | |
| 68 | ||
| 69 | static u8 f300_get_byte(struct cx23885_dev *dev) | |
| 70 | { | |
| 71 | u8 i, dta = 0; | |
| 72 | ||
| 73 | for (i = 0; i < 8; i++) { | |
| 74 | f300_set_line(dev, F300_CLK, 0); | |
| 75 | udelay(30); | |
| 76 | dta <<= 1; | |
| 77 | f300_set_line(dev, F300_CLK, 1); | |
| 78 | udelay(30); | |
| 79 | dta |= f300_get_line(dev, F300_DATA);/* msb first */ | |
| 80 | ||
| 81 | } | |
| 82 | ||
| 83 | return dta; | |
| 84 | } | |
| 85 | ||
| 86 | static u8 f300_xfer(struct dvb_frontend *fe, u8 *buf) | |
| 87 | { | |
| 88 | struct cx23885_tsport *port = fe->dvb->priv; | |
| 89 | struct cx23885_dev *dev = port->dev; | |
| 90 | u8 i, temp, ret = 0; | |
| 91 | ||
| 92 | temp = buf[0]; | |
| 93 | for (i = 0; i < buf[0]; i++) | |
| 94 | temp += buf[i + 1]; | |
| 95 | temp = (~temp + 1);/* get check sum */ | |
| 96 | buf[1 + buf[0]] = temp; | |
| 97 | ||
| 98 | f300_set_line(dev, F300_RESET, 1); | |
| 99 | f300_set_line(dev, F300_CLK, 1); | |
| 100 | udelay(30); | |
| 101 | f300_set_line(dev, F300_DATA, 1); | |
| 102 | msleep(1); | |
| 103 | ||
| 104 | /* question: */ | |
| 105 | f300_set_line(dev, F300_RESET, 0);/* begin to send data */ | |
| 106 | msleep(1); | |
| 107 | ||
| 108 | f300_send_byte(dev, 0xe0);/* the slave address is 0xe0, write */ | |
| 109 | msleep(1); | |
| 110 | ||
| 111 | temp = buf[0]; | |
| 112 | temp += 2; | |
| 113 | for (i = 0; i < temp; i++) | |
| 114 | f300_send_byte(dev, buf[i]); | |
| 115 | ||
| 116 | f300_set_line(dev, F300_RESET, 1);/* sent data over */ | |
| 117 | f300_set_line(dev, F300_DATA, 1); | |
| 118 | ||
| 119 | /* answer: */ | |
| 120 | temp = 0; | |
| 121 | for (i = 0; ((i < 8) & (temp == 0)); i++) { | |
| 122 | msleep(1); | |
| 123 | if (f300_get_line(dev, F300_BUSY) == 0) | |
| 124 | temp = 1; | |
| 125 | } | |
| 126 | ||
| 127 | if (i > 7) { | |
| 128 | printk(KERN_ERR "%s: timeout, the slave no response\n", | |
| 129 | __func__); | |
| 130 | ret = 1; /* timeout, the slave no response */ | |
| 131 | } else { /* the slave not busy, prepare for getting data */ | |
| 132 | f300_set_line(dev, F300_RESET, 0);/*ready...*/ | |
| 133 | msleep(1); | |
| 134 | f300_send_byte(dev, 0xe1);/* 0xe1 is Read */ | |
| 135 | msleep(1); | |
| 136 | temp = f300_get_byte(dev);/*get the data length */ | |
| 137 | if (temp > 14) | |
| 138 | temp = 14; | |
| 139 | ||
| 140 | for (i = 0; i < (temp + 1); i++) | |
| 141 | f300_get_byte(dev);/* get data to empty buffer */ | |
| 142 | ||
| 143 | f300_set_line(dev, F300_RESET, 1);/* received data over */ | |
| 144 | f300_set_line(dev, F300_DATA, 1); | |
| 145 | } | |
| 146 | ||
| 147 | return ret; | |
| 148 | } | |
| 149 | ||
| 150 | int f300_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) | |
| 151 | { | |
| 152 | u8 buf[16]; | |
| 153 | ||
| 154 | buf[0] = 0x05; | |
| 155 | buf[1] = 0x38;/* write port */ | |
| 156 | buf[2] = 0x01;/* A port, lnb power */ | |
| 157 | ||
| 158 | switch (voltage) { | |
| 159 | case SEC_VOLTAGE_13: | |
| 160 | buf[3] = 0x01;/* power on */ | |
| 161 | buf[4] = 0x02;/* B port, H/V */ | |
| 162 | buf[5] = 0x00;/*13V v*/ | |
| 163 | break; | |
| 164 | case SEC_VOLTAGE_18: | |
| 165 | buf[3] = 0x01; | |
| 166 | buf[4] = 0x02; | |
| 167 | buf[5] = 0x01;/* 18V h*/ | |
| 168 | break; | |
| 169 | case SEC_VOLTAGE_OFF: | |
| 170 | buf[3] = 0x00;/* power off */ | |
| 171 | buf[4] = 0x00; | |
| 172 | buf[5] = 0x00; | |
| 173 | break; | |
| 174 | } | |
| 175 | ||
| 176 | return f300_xfer(fe, buf); | |
| 177 | } |