364 lines
8.5 KiB
C
364 lines
8.5 KiB
C
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/*
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* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
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* flexcop-sram.c - functions for controlling the SRAM
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* see flexcop.c for copyright information
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*/
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#include "flexcop.h"
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static void flexcop_sram_set_chip(struct flexcop_device *fc,
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flexcop_sram_type_t type)
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{
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flexcop_set_ibi_value(wan_ctrl_reg_71c, sram_chip, type);
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}
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int flexcop_sram_init(struct flexcop_device *fc)
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{
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switch (fc->rev) {
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case FLEXCOP_II:
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case FLEXCOP_IIB:
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flexcop_sram_set_chip(fc, FC_SRAM_1_32KB);
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break;
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case FLEXCOP_III:
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flexcop_sram_set_chip(fc, FC_SRAM_1_48KB);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest,
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flexcop_sram_dest_target_t target)
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{
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flexcop_ibi_value v;
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v = fc->read_ibi_reg(fc, sram_dest_reg_714);
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if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
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err("SRAM destination target to available on FlexCopII(b)\n");
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return -EINVAL;
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}
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deb_sram("sram dest: %x target: %x\n", dest, target);
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if (dest & FC_SRAM_DEST_NET)
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v.sram_dest_reg_714.NET_Dest = target;
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if (dest & FC_SRAM_DEST_CAI)
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v.sram_dest_reg_714.CAI_Dest = target;
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if (dest & FC_SRAM_DEST_CAO)
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v.sram_dest_reg_714.CAO_Dest = target;
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if (dest & FC_SRAM_DEST_MEDIA)
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v.sram_dest_reg_714.MEDIA_Dest = target;
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fc->write_ibi_reg(fc,sram_dest_reg_714,v);
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udelay(1000); /* TODO delay really necessary */
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return 0;
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}
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EXPORT_SYMBOL(flexcop_sram_set_dest);
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void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s)
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{
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flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s);
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}
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EXPORT_SYMBOL(flexcop_wan_set_speed);
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void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill)
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{
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flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
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v.sram_dest_reg_714.ctrl_usb_wan = usb_wan;
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v.sram_dest_reg_714.ctrl_sramdma = sramdma;
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v.sram_dest_reg_714.ctrl_maximumfill = maximumfill;
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fc->write_ibi_reg(fc,sram_dest_reg_714,v);
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}
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EXPORT_SYMBOL(flexcop_sram_ctrl);
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#if 0
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static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
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{
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int i, retries;
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u32 command;
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for (i = 0; i < len; i++) {
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command = bank | addr | 0x04000000 | (*buf << 0x10);
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retries = 2;
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while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
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mdelay(1);
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retries--;
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}
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if (retries == 0)
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printk("%s: SRAM timeout\n", __func__);
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write_reg_dw(adapter, 0x700, command);
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buf++;
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addr++;
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}
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}
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static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
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{
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int i, retries;
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u32 command, value;
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for (i = 0; i < len; i++) {
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command = bank | addr | 0x04008000;
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retries = 10000;
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while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
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mdelay(1);
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retries--;
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}
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if (retries == 0)
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printk("%s: SRAM timeout\n", __func__);
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write_reg_dw(adapter, 0x700, command);
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retries = 10000;
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while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
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mdelay(1);
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retries--;
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}
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if (retries == 0)
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printk("%s: SRAM timeout\n", __func__);
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value = read_reg_dw(adapter, 0x700) >> 0x10;
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*buf = (value & 0xff);
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addr++;
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buf++;
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}
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}
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static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
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{
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u32 bank;
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bank = 0;
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if (adapter->dw_sram_type == 0x20000) {
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bank = (addr & 0x18000) << 0x0d;
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}
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if (adapter->dw_sram_type == 0x00000) {
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if ((addr >> 0x0f) == 0)
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bank = 0x20000000;
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else
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bank = 0x10000000;
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}
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flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
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}
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static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
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{
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u32 bank;
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bank = 0;
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if (adapter->dw_sram_type == 0x20000) {
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bank = (addr & 0x18000) << 0x0d;
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}
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if (adapter->dw_sram_type == 0x00000) {
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if ((addr >> 0x0f) == 0)
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bank = 0x20000000;
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else
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bank = 0x10000000;
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}
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flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
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}
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static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
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{
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u32 length;
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while (len != 0) {
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length = len;
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/* check if the address range belongs to the same
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* 32K memory chip. If not, the data is read
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* from one chip at a time */
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if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
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length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
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}
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sram_read_chunk(adapter, addr, buf, length);
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addr = addr + length;
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buf = buf + length;
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len = len - length;
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}
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}
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static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
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{
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u32 length;
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while (len != 0) {
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length = len;
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/* check if the address range belongs to the same
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* 32K memory chip. If not, the data is
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* written to one chip at a time */
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if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
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length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
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}
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sram_write_chunk(adapter, addr, buf, length);
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addr = addr + length;
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buf = buf + length;
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len = len - length;
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}
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}
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static void sram_set_size(struct adapter *adapter, u32 mask)
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{
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write_reg_dw(adapter, 0x71c,
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(mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
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}
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static void sram_init(struct adapter *adapter)
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{
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u32 tmp;
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tmp = read_reg_dw(adapter, 0x71c);
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write_reg_dw(adapter, 0x71c, 1);
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if (read_reg_dw(adapter, 0x71c) != 0) {
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write_reg_dw(adapter, 0x71c, tmp);
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adapter->dw_sram_type = tmp & 0x30000;
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ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
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} else {
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adapter->dw_sram_type = 0x10000;
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ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
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}
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}
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static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
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{
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u8 tmp1, tmp2;
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dprintk("%s: mask = %x, addr = %x\n", __func__, mask, addr);
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sram_set_size(adapter, mask);
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sram_init(adapter);
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tmp2 = 0xa5;
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tmp1 = 0x4f;
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sram_write(adapter, addr, &tmp2, 1);
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sram_write(adapter, addr + 4, &tmp1, 1);
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tmp2 = 0;
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mdelay(20);
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sram_read(adapter, addr, &tmp2, 1);
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sram_read(adapter, addr, &tmp2, 1);
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dprintk("%s: wrote 0xa5, read 0x%2x\n", __func__, tmp2);
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if (tmp2 != 0xa5)
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return 0;
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tmp2 = 0x5a;
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tmp1 = 0xf4;
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sram_write(adapter, addr, &tmp2, 1);
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sram_write(adapter, addr + 4, &tmp1, 1);
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tmp2 = 0;
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mdelay(20);
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sram_read(adapter, addr, &tmp2, 1);
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sram_read(adapter, addr, &tmp2, 1);
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dprintk("%s: wrote 0x5a, read 0x%2x\n", __func__, tmp2);
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if (tmp2 != 0x5a)
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return 0;
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return 1;
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}
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static u32 sram_length(struct adapter *adapter)
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{
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if (adapter->dw_sram_type == 0x10000)
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return 32768; /* 32K */
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if (adapter->dw_sram_type == 0x00000)
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return 65536; /* 64K */
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if (adapter->dw_sram_type == 0x20000)
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return 131072; /* 128K */
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return 32768; /* 32K */
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}
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/* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
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- for 128K there are 4x32K chips at bank 0,1,2,3.
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- for 64K there are 2x32K chips at bank 1,2.
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- for 32K there is one 32K chip at bank 0.
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FlexCop works only with one bank at a time. The bank is selected
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by bits 28-29 of the 0x700 register.
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bank 0 covers addresses 0x00000-0x07fff
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bank 1 covers addresses 0x08000-0x0ffff
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bank 2 covers addresses 0x10000-0x17fff
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bank 3 covers addresses 0x18000-0x1ffff */
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static int flexcop_sram_detect(struct flexcop_device *fc)
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{
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flexcop_ibi_value r208, r71c_0, vr71c_1;
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r208 = fc->read_ibi_reg(fc, ctrl_208);
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fc->write_ibi_reg(fc, ctrl_208, ibi_zero);
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r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);
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write_reg_dw(adapter, 0x71c, 1);
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tmp3 = read_reg_dw(adapter, 0x71c);
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dprintk("%s: tmp3 = %x\n", __func__, tmp3);
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write_reg_dw(adapter, 0x71c, tmp2);
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// check for internal SRAM ???
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tmp3--;
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if (tmp3 != 0) {
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sram_set_size(adapter, 0x10000);
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sram_init(adapter);
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write_reg_dw(adapter, 0x208, tmp);
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dprintk("%s: sram size = 32K\n", __func__);
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return 32;
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}
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if (sram_test_location(adapter, 0x20000, 0x18000) != 0) {
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sram_set_size(adapter, 0x20000);
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sram_init(adapter);
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write_reg_dw(adapter, 0x208, tmp);
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dprintk("%s: sram size = 128K\n", __func__);
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return 128;
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}
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if (sram_test_location(adapter, 0x00000, 0x10000) != 0) {
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sram_set_size(adapter, 0x00000);
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sram_init(adapter);
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write_reg_dw(adapter, 0x208, tmp);
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dprintk("%s: sram size = 64K\n", __func__);
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return 64;
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}
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if (sram_test_location(adapter, 0x10000, 0x00000) != 0) {
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sram_set_size(adapter, 0x10000);
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sram_init(adapter);
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write_reg_dw(adapter, 0x208, tmp);
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dprintk("%s: sram size = 32K\n", __func__);
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return 32;
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}
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sram_set_size(adapter, 0x10000);
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sram_init(adapter);
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write_reg_dw(adapter, 0x208, tmp);
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dprintk("%s: SRAM detection failed. Set to 32K \n", __func__);
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return 0;
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}
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static void sll_detect_sram_size(struct adapter *adapter)
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{
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sram_detect_for_flex2(adapter);
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}
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#endif
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