diff options
Diffstat (limited to 'drivers/media/common/b2c2/flexcop-sram.c')
| -rw-r--r-- | drivers/media/common/b2c2/flexcop-sram.c | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/drivers/media/common/b2c2/flexcop-sram.c b/drivers/media/common/b2c2/flexcop-sram.c new file mode 100644 index 0000000000..d97962eb01 --- /dev/null +++ b/drivers/media/common/b2c2/flexcop-sram.c @@ -0,0 +1,364 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III + * flexcop-sram.c - functions for controlling the SRAM + * see flexcop.c for copyright information + */ +#include "flexcop.h" + +static void flexcop_sram_set_chip(struct flexcop_device *fc, + flexcop_sram_type_t type) +{ + flexcop_set_ibi_value(wan_ctrl_reg_71c, sram_chip, type); +} + +int flexcop_sram_init(struct flexcop_device *fc) +{ + switch (fc->rev) { + case FLEXCOP_II: + case FLEXCOP_IIB: + flexcop_sram_set_chip(fc, FC_SRAM_1_32KB); + break; + case FLEXCOP_III: + flexcop_sram_set_chip(fc, FC_SRAM_1_48KB); + break; + default: + return -EINVAL; + } + return 0; +} + +int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, + flexcop_sram_dest_target_t target) +{ + flexcop_ibi_value v; + v = fc->read_ibi_reg(fc, sram_dest_reg_714); + + if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) { + err("SRAM destination target to available on FlexCopII(b)\n"); + return -EINVAL; + } + deb_sram("sram dest: %x target: %x\n", dest, target); + + if (dest & FC_SRAM_DEST_NET) + v.sram_dest_reg_714.NET_Dest = target; + if (dest & FC_SRAM_DEST_CAI) + v.sram_dest_reg_714.CAI_Dest = target; + if (dest & FC_SRAM_DEST_CAO) + v.sram_dest_reg_714.CAO_Dest = target; + if (dest & FC_SRAM_DEST_MEDIA) + v.sram_dest_reg_714.MEDIA_Dest = target; + + fc->write_ibi_reg(fc,sram_dest_reg_714,v); + udelay(1000); /* TODO delay really necessary */ + + return 0; +} +EXPORT_SYMBOL(flexcop_sram_set_dest); + +void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s) +{ + flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s); +} +EXPORT_SYMBOL(flexcop_wan_set_speed); + +void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill) +{ + flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714); + v.sram_dest_reg_714.ctrl_usb_wan = usb_wan; + v.sram_dest_reg_714.ctrl_sramdma = sramdma; + v.sram_dest_reg_714.ctrl_maximumfill = maximumfill; + fc->write_ibi_reg(fc,sram_dest_reg_714,v); +} +EXPORT_SYMBOL(flexcop_sram_ctrl); + +#if 0 +static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len) +{ + int i, retries; + u32 command; + + for (i = 0; i < len; i++) { + command = bank | addr | 0x04000000 | (*buf << 0x10); + + retries = 2; + + while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) { + mdelay(1); + retries--; + } + + if (retries == 0) + printk("%s: SRAM timeout\n", __func__); + + write_reg_dw(adapter, 0x700, command); + + buf++; + addr++; + } +} + +static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len) +{ + int i, retries; + u32 command, value; + + for (i = 0; i < len; i++) { + command = bank | addr | 0x04008000; + + retries = 10000; + + while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) { + mdelay(1); + retries--; + } + + if (retries == 0) + printk("%s: SRAM timeout\n", __func__); + + write_reg_dw(adapter, 0x700, command); + + retries = 10000; + + while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) { + mdelay(1); + retries--; + } + + if (retries == 0) + printk("%s: SRAM timeout\n", __func__); + + value = read_reg_dw(adapter, 0x700) >> 0x10; + + *buf = (value & 0xff); + + addr++; + buf++; + } +} + +static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len) +{ + u32 bank; + + bank = 0; + + if (adapter->dw_sram_type == 0x20000) { + bank = (addr & 0x18000) << 0x0d; + } + + if (adapter->dw_sram_type == 0x00000) { + if ((addr >> 0x0f) == 0) + bank = 0x20000000; + else + bank = 0x10000000; + } + flex_sram_write(adapter, bank, addr & 0x7fff, buf, len); +} + +static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len) +{ + u32 bank; + bank = 0; + + if (adapter->dw_sram_type == 0x20000) { + bank = (addr & 0x18000) << 0x0d; + } + + if (adapter->dw_sram_type == 0x00000) { + if ((addr >> 0x0f) == 0) + bank = 0x20000000; + else + bank = 0x10000000; + } + flex_sram_read(adapter, bank, addr & 0x7fff, buf, len); +} + +static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len) +{ + u32 length; + while (len != 0) { + length = len; + /* check if the address range belongs to the same + * 32K memory chip. If not, the data is read + * from one chip at a time */ + if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) { + length = (((addr >> 0x0f) + 1) << 0x0f) - addr; + } + + sram_read_chunk(adapter, addr, buf, length); + addr = addr + length; + buf = buf + length; + len = len - length; + } +} + +static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len) +{ + u32 length; + while (len != 0) { + length = len; + + /* check if the address range belongs to the same + * 32K memory chip. If not, the data is + * written to one chip at a time */ + if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) { + length = (((addr >> 0x0f) + 1) << 0x0f) - addr; + } + + sram_write_chunk(adapter, addr, buf, length); + addr = addr + length; + buf = buf + length; + len = len - length; + } +} + +static void sram_set_size(struct adapter *adapter, u32 mask) +{ + write_reg_dw(adapter, 0x71c, + (mask | (~0x30000 & read_reg_dw(adapter, 0x71c)))); +} + +static void sram_init(struct adapter *adapter) +{ + u32 tmp; + tmp = read_reg_dw(adapter, 0x71c); + write_reg_dw(adapter, 0x71c, 1); + + if (read_reg_dw(adapter, 0x71c) != 0) { + write_reg_dw(adapter, 0x71c, tmp); + adapter->dw_sram_type = tmp & 0x30000; + ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type); + } else { + adapter->dw_sram_type = 0x10000; + ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type); + } +} + +static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr) +{ + u8 tmp1, tmp2; + dprintk("%s: mask = %x, addr = %x\n", __func__, mask, addr); + + sram_set_size(adapter, mask); + sram_init(adapter); + + tmp2 = 0xa5; + tmp1 = 0x4f; + + sram_write(adapter, addr, &tmp2, 1); + sram_write(adapter, addr + 4, &tmp1, 1); + + tmp2 = 0; + mdelay(20); + + sram_read(adapter, addr, &tmp2, 1); + sram_read(adapter, addr, &tmp2, 1); + + dprintk("%s: wrote 0xa5, read 0x%2x\n", __func__, tmp2); + + if (tmp2 != 0xa5) + return 0; + + tmp2 = 0x5a; + tmp1 = 0xf4; + + sram_write(adapter, addr, &tmp2, 1); + sram_write(adapter, addr + 4, &tmp1, 1); + + tmp2 = 0; + mdelay(20); + + sram_read(adapter, addr, &tmp2, 1); + sram_read(adapter, addr, &tmp2, 1); + + dprintk("%s: wrote 0x5a, read 0x%2x\n", __func__, tmp2); + + if (tmp2 != 0x5a) + return 0; + return 1; +} + +static u32 sram_length(struct adapter *adapter) +{ + if (adapter->dw_sram_type == 0x10000) + return 32768; /* 32K */ + if (adapter->dw_sram_type == 0x00000) + return 65536; /* 64K */ + if (adapter->dw_sram_type == 0x20000) + return 131072; /* 128K */ + return 32768; /* 32K */ +} + +/* FlexcopII can work with 32K, 64K or 128K of external SRAM memory. + - for 128K there are 4x32K chips at bank 0,1,2,3. + - for 64K there are 2x32K chips at bank 1,2. + - for 32K there is one 32K chip at bank 0. + + FlexCop works only with one bank at a time. The bank is selected + by bits 28-29 of the 0x700 register. + + bank 0 covers addresses 0x00000-0x07fff + bank 1 covers addresses 0x08000-0x0ffff + bank 2 covers addresses 0x10000-0x17fff + bank 3 covers addresses 0x18000-0x1ffff */ + +static int flexcop_sram_detect(struct flexcop_device *fc) +{ + flexcop_ibi_value r208, r71c_0, vr71c_1; + r208 = fc->read_ibi_reg(fc, ctrl_208); + fc->write_ibi_reg(fc, ctrl_208, ibi_zero); + + r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c); + write_reg_dw(adapter, 0x71c, 1); + tmp3 = read_reg_dw(adapter, 0x71c); + dprintk("%s: tmp3 = %x\n", __func__, tmp3); + write_reg_dw(adapter, 0x71c, tmp2); + + // check for internal SRAM ??? + tmp3--; + if (tmp3 != 0) { + sram_set_size(adapter, 0x10000); + sram_init(adapter); + write_reg_dw(adapter, 0x208, tmp); + dprintk("%s: sram size = 32K\n", __func__); + return 32; + } + + if (sram_test_location(adapter, 0x20000, 0x18000) != 0) { + sram_set_size(adapter, 0x20000); + sram_init(adapter); + write_reg_dw(adapter, 0x208, tmp); + dprintk("%s: sram size = 128K\n", __func__); + return 128; + } + + if (sram_test_location(adapter, 0x00000, 0x10000) != 0) { + sram_set_size(adapter, 0x00000); + sram_init(adapter); + write_reg_dw(adapter, 0x208, tmp); + dprintk("%s: sram size = 64K\n", __func__); + return 64; + } + + if (sram_test_location(adapter, 0x10000, 0x00000) != 0) { + sram_set_size(adapter, 0x10000); + sram_init(adapter); + write_reg_dw(adapter, 0x208, tmp); + dprintk("%s: sram size = 32K\n", __func__); + return 32; + } + + sram_set_size(adapter, 0x10000); + sram_init(adapter); + write_reg_dw(adapter, 0x208, tmp); + dprintk("%s: SRAM detection failed. Set to 32K \n", __func__); + return 0; +} + +static void sll_detect_sram_size(struct adapter *adapter) +{ + sram_detect_for_flex2(adapter); +} + +#endif |