1 files changed, 363 insertions, 0 deletions

diff --git a/drivers/media/pci/b2c2/flexcop-sram.c b/drivers/media/pci/b2c2/flexcop-sram.c
new file mode 100644
index 000000000000..f2199e43e803
--- /dev/null
+++ b/drivers/media/pci/b2c2/flexcop-sram.c
@@ -0,0 +1,363 @@
+/*
+ * 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