diff options
Diffstat (limited to 'src/northbridge/via')
| -rw-r--r-- | src/northbridge/via/cn700/agp.c | 76 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/chip.h | 3 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/cn700.h | 20 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/northbridge.c | 159 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/raminit.c | 231 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/raminit.h | 4 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vga.c | 55 |
7 files changed, 282 insertions, 266 deletions
diff --git a/src/northbridge/via/cn700/agp.c b/src/northbridge/via/cn700/agp.c index 7158369cb3..6ae8e78361 100644 --- a/src/northbridge/via/cn700/agp.c +++ b/src/northbridge/via/cn700/agp.c @@ -32,24 +32,27 @@ static void agp_init(device_t dev) { u32 reg32; - - /* Some of this may not be necessary, - * it should be handled by the OS */ + + /* Some of this may not be necessary (should be handled by the OS). */ printk_debug("Enabling AGP.\n"); - - /* Allow R/W access to AGP registers */ + + /* Allow R/W access to AGP registers. */ pci_write_config8(dev, 0x4d, 0x15); - - /* Setup PCI latency timer */ + + /* Setup PCI latency timer. */ pci_write_config8(dev, 0xd, 0x8); - - /* Set to AGP 3.0 Mode, which should theoretically render the rest of - * the registers set here pointless */ + + /* + * Set to AGP 3.0 Mode, which should theoretically render the rest of + * the registers set here pointless. + */ pci_write_config8(dev, 0x84, 0xb); - + /* AGP Request Queue Size */ pci_write_config8(dev, 0x4a, 0x1f); - /* AGP Hardware Support (default 0xc4) + + /* + * AGP Hardware Support (default 0xc4) * 7: AGP SBA Enable (1 to Enable) * 6: AGP Enable * 5: Reserved @@ -57,25 +60,26 @@ static void agp_init(device_t dev) * 3: AGP8X Mode Enable * 2: AGP4X Mode Enable * 1: AGP2X Mode Enable - * 0: AGP1X Mode Enable */ + * 0: AGP1X Mode Enable + */ pci_write_config8(dev, 0x4b, 0xc4); - + /* Enable AGP Backdoor */ pci_write_config8(dev, 0xb5, 0x03); - - /* Set aperture to 32MB */ - /* TODO: Use config option, explain how it works */ + + /* Set aperture to 32 MB. */ + /* TODO: Use config option, explain how it works. */ pci_write_config32(dev, 0x94, 0x00010f38); - /* Set GART Table Base Address (31:12) */ + /* Set GART Table Base Address (31:12). */ pci_write_config32(dev, 0x98, (0x1558 << 12)); - /* Set AGP Aperture Base */ + /* Set AGP Aperture Base. */ pci_write_config32(dev, 0x10, 0xf8000008); - /* Enable CPU/PMSTR GART Access */ + /* Enable CPU/PMSTR GART Access. */ reg32 = pci_read_config8(dev, 0xbf); reg32 |= 0x80; pci_write_config8(dev, 0xbf, reg32); - + /* Enable AGP Aperture. */ reg32 = pci_read_config32(dev, 0x94); reg32 |= (3 << 7); @@ -84,16 +88,17 @@ static void agp_init(device_t dev) /* AGP Control */ pci_write_config8(dev, 0xbc, 0x21); pci_write_config8(dev, 0xbd, 0xd2); - - /* AGP Pad, driving strength, and delay control */ - /* All this should be constant, seeing as the - * VGA controller is onboard */ + + /* + * AGP Pad, driving strength, and delay control. All this should be + * constant, seeing as the VGA controller is onboard. + */ pci_write_config8(dev, 0x40, 0xc7); pci_write_config8(dev, 0x41, 0xdb); pci_write_config8(dev, 0x42, 0x10); pci_write_config8(dev, 0x43, 0xdb); pci_write_config8(dev, 0x44, 0x24); - + /* AGPC CKG Control */ pci_write_config8(dev, 0xc0, 0x02); pci_write_config8(dev, 0xc1, 0x02); @@ -108,27 +113,30 @@ static const struct device_operations agp_operations = { }; static const struct pci_driver agp_driver __pci_driver = { - .ops = &agp_operations, + .ops = &agp_operations, .vendor = PCI_VENDOR_ID_VIA, .device = PCI_DEVICE_ID_VIA_CN700_AGP, }; -/* This is the AGP 3.0 "bridge" @Bus 0 Device 1 Func 0. When using AGP 3.0, the -config in this device takes presidence. We configure both just to be safe. */ +/* + * This is the AGP 3.0 "bridge" @Bus 0 Device 1 Func 0. When using AGP 3.0, the + * config in this device takes presidence. We configure both just to be safe. + */ static void agp_bridge_init(device_t dev) { - printk_debug("Setting up AGP Bridge device\n"); + printk_debug("Setting up AGP bridge device\n"); + pci_write_config16(dev, 0x4, 0x0007); /* Secondary Bus Number */ pci_write_config8(dev, 0x19, 0x01); /* Subordinate Bus Number */ pci_write_config8(dev, 0x1a, 0x01); - /* IO Base */ + /* I/O Base */ pci_write_config8(dev, 0x1c, 0xd0); - /* IO Limit */ + /* I/O Limit */ pci_write_config8(dev, 0x1d, 0xd0); - + /* Memory Base */ pci_write_config16(dev, 0x20, 0xfb00); /* Memory Limit */ @@ -159,7 +167,7 @@ static const struct device_operations agp_bridge_operations = { }; static const struct pci_driver agp_bridge_driver __pci_driver = { - .ops = &agp_bridge_operations, + .ops = &agp_bridge_operations, .vendor = PCI_VENDOR_ID_VIA, .device = PCI_DEVICE_ID_VIA_CN700_BRIDGE, }; diff --git a/src/northbridge/via/cn700/chip.h b/src/northbridge/via/cn700/chip.h index aff009c888..e5534968d7 100644 --- a/src/northbridge/via/cn700/chip.h +++ b/src/northbridge/via/cn700/chip.h @@ -18,8 +18,7 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -struct northbridge_via_cn700_config -{ +struct northbridge_via_cn700_config { }; extern struct chip_operations northbridge_via_cn700_ops; diff --git a/src/northbridge/via/cn700/cn700.h b/src/northbridge/via/cn700/cn700.h index b9d7ad3455..a98af45410 100644 --- a/src/northbridge/via/cn700/cn700.h +++ b/src/northbridge/via/cn700/cn700.h @@ -19,18 +19,20 @@ */ #ifndef __ROMCC__ -static void cn700_noop(){} +static void cn700_noop() +{ +} #endif /* VGA stuff */ -#define SR_INDEX 0x3c4 -#define SR_DATA 0x3c5 -#define CRTM_INDEX 0x3b4 -#define CRTM_DATA 0x3b5 -#define CRTC_INDEX 0x3d4 -#define CRTC_DATA 0x3d5 +#define SR_INDEX 0x3c4 +#define SR_DATA 0x3c5 +#define CRTM_INDEX 0x3b4 +#define CRTM_DATA 0x3b5 +#define CRTC_INDEX 0x3d4 +#define CRTC_DATA 0x3d5 -/* Memory Controller Registers */ +/* Memory controller registers */ #define RANK0_END 0x40 #define RANK1_END 0x41 #define RANK2_END 0x42 @@ -45,7 +47,7 @@ static void cn700_noop(){} #define CH_A_DQS_OUTPUT_DELAY 0x70 #define CH_A_MD_OUTPUT_DELAY 0x71 -/* RAM Init Commands */ +/* RAM init commands */ #define RAM_COMMAND_NORMAL 0x0 #define RAM_COMMAND_NOP 0x1 #define RAM_COMMAND_PRECHARGE 0x2 diff --git a/src/northbridge/via/cn700/northbridge.c b/src/northbridge/via/cn700/northbridge.c index 3f4fe373d7..af914528d9 100644 --- a/src/northbridge/via/cn700/northbridge.c +++ b/src/northbridge/via/cn700/northbridge.c @@ -38,17 +38,15 @@ static void memctrl_init(device_t dev) { device_t vlink_dev; u16 reg16; - u8 ranks; - u8 pagec, paged, pagee, pagef; - u8 shadowreg; - - /* Set up the vga framebuffer size */ + u8 ranks, pagec, paged, pagee, pagef, shadowreg; + + /* Set up the VGA framebuffer size. */ reg16 = (log2(CONFIG_VIDEO_MB) << 12) | (1 << 15); pci_write_config16(dev, 0xa0, reg16); - - /* Set up VGA timers */ + + /* Set up VGA timers. */ pci_write_config8(dev, 0xa2, 0x44); - + for (ranks = 0x4b; ranks >= 0x48; ranks--) { if (pci_read_config8(dev, ranks)) { ranks -= 0x48; @@ -64,7 +62,7 @@ static void memctrl_init(device_t dev) /* AGPCINT Misc. */ pci_write_config8(dev, 0xb8, 0x08); - /* shadown ram */ + /* Shadow RAM */ pagec = 0xff, paged = 0xff, pagee = 0xff, pagef = 0x30; /* PAGE C, D, E are all read write enable */ pci_write_config8(dev, 0x80, pagec); @@ -75,11 +73,13 @@ static void memctrl_init(device_t dev) shadowreg |= pagef; pci_write_config8(dev, 0x83, shadowreg); /* vlink mirror */ - vlink_dev = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CN700_VLINK, 0); + vlink_dev = dev_find_device(PCI_VENDOR_ID_VIA, + PCI_DEVICE_ID_VIA_CN700_VLINK, 0); if (vlink_dev) { pci_write_config8(vlink_dev, 0x61, pagec); pci_write_config8(vlink_dev, 0x62, paged); pci_write_config8(vlink_dev, 0x64, pagee); + shadowreg = pci_read_config8(vlink_dev, 0x63); shadowreg |= pagef; pci_write_config8(vlink_dev, 0x63, shadowreg); @@ -88,91 +88,93 @@ static void memctrl_init(device_t dev) static const struct device_operations memctrl_operations = { .read_resources = cn700_noop, - .init = memctrl_init, + .init = memctrl_init, }; static const struct pci_driver memctrl_driver __pci_driver = { - .ops = &memctrl_operations, + .ops = &memctrl_operations, .vendor = PCI_VENDOR_ID_VIA, .device = PCI_DEVICE_ID_VIA_CN700_MEMCTRL, }; static void pci_domain_read_resources(device_t dev) { - struct resource *resource; + struct resource *resource; printk_spew("Entering cn700 pci_domain_read_resources.\n"); - /* Initialize the system wide io space constraints */ - resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0)); - resource->limit = 0xffffUL; - resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | - IORESOURCE_ASSIGNED; + /* Initialize the system wide I/O space constraints. */ + resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); + resource->limit = 0xffffUL; + resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED; - /* Initialize the system wide memory resources constraints */ - resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0)); - resource->limit = 0xffffffffULL; - resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | - IORESOURCE_ASSIGNED; + /* Initialize the system wide memory resources constraints. */ + resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); + resource->limit = 0xffffffffULL; + resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED; printk_spew("Leaving cn700 pci_domain_read_resources.\n"); } static void ram_resource(device_t dev, unsigned long index, - unsigned long basek, unsigned long sizek) + unsigned long basek, unsigned long sizek) { - struct resource *resource; - - if (!sizek) { - return; - } - resource = new_resource(dev, index); - resource->base = ((resource_t)basek) << 10; - resource->size = ((resource_t)sizek) << 10; - resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \ - IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + struct resource *resource; + + if (!sizek) + return; + + resource = new_resource(dev, index); + resource->base = ((resource_t) basek) << 10; + resource->size = ((resource_t) sizek) << 10; + resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; } static void tolm_test(void *gp, struct device *dev, struct resource *new) { struct resource **best_p = gp; struct resource *best; + best = *best_p; - if (!best || (best->base > new->base)) { + if (!best || (best->base > new->base)) best = new; - } *best_p = best; } static u32 find_pci_tolm(struct bus *bus) { - print_debug("Entering find_pci_tolm\n"); struct resource *min; u32 tolm; + + print_debug("Entering find_pci_tolm\n"); + min = 0; - search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min); + search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, + tolm_test, &min); tolm = 0xffffffffUL; - if (min && tolm > min->base) { + if (min && tolm > min->base) tolm = min->base; - } + print_debug("Leaving find_pci_tolm\n"); + return tolm; } static void pci_domain_set_resources(device_t dev) { - /* - * the order is important to find the correct ram size. - */ - static const u8 ramregs[] = {0x43, 0x42, 0x41, 0x40}; + /* The order is important to find the correct RAM size. */ + static const u8 ramregs[] = { 0x43, 0x42, 0x41, 0x40 }; device_t mc_dev; - u32 pci_tolm; + u32 pci_tolm; printk_spew("Entering cn700 pci_domain_set_resources.\n"); - pci_tolm = find_pci_tolm(&dev->link[0]); - mc_dev = dev_find_device(PCI_VENDOR_ID_VIA, - PCI_DEVICE_ID_VIA_CN700_MEMCTRL, 0); + pci_tolm = find_pci_tolm(&dev->link[0]); + mc_dev = dev_find_device(PCI_VENDOR_ID_VIA, + PCI_DEVICE_ID_VIA_CN700_MEMCTRL, 0); if (mc_dev) { unsigned long tomk, tolmk; @@ -180,30 +182,30 @@ static void pci_domain_set_resources(device_t dev) int i, idx; /* - * once the register value is not zero, the ramsize is - * this register's value multiply 64 * 1024 * 1024 + * Once the register value is not zero, the RAM size is + * this register's value multiply 64 * 1024 * 1024. */ - for(rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) { - unsigned char reg; + for (rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) { rambits = pci_read_config8(mc_dev, ramregs[i]); if (rambits != 0) break; } - + tomk = rambits * 64 * 1024; printk_spew("tomk is 0x%x\n", tomk); - /* Compute the Top Of Low Memory, in Kb */ + /* Compute the Top Of Low Memory (TOLM), in Kb. */ tolmk = pci_tolm >> 10; if (tolmk >= tomk) { /* The PCI hole does does not overlap the memory. */ tolmk = tomk; } - /* Report the memory regions */ + /* Report the memory regions. */ idx = 10; /* TODO: Hole needed? */ - ram_resource(dev, idx++, 0, 640); /* first 640k */ - /* Leave a hole for vga, 0xa0000 - 0xc0000 */ - ram_resource(dev, idx++, 768, (tolmk - 768 - CONFIG_VIDEO_MB * 1024)); + ram_resource(dev, idx++, 0, 640); /* First 640k */ + /* Leave a hole for VGA, 0xa0000 - 0xc0000 */ + ram_resource(dev, idx++, 768, + (tolmk - 768 - CONFIG_VIDEO_MB * 1024)); } assign_resources(&dev->link[0]); } @@ -212,21 +214,21 @@ static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) { printk_debug("Entering cn700 pci_domain_scan_bus.\n"); - max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max); - return max; + max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max); + return max; } static const struct device_operations pci_domain_ops = { - .read_resources = pci_domain_read_resources, - .set_resources = pci_domain_set_resources, - .enable_resources = enable_childrens_resources, - .init = 0, - .scan_bus = pci_domain_scan_bus, -}; + .read_resources = pci_domain_read_resources, + .set_resources = pci_domain_set_resources, + .enable_resources = enable_childrens_resources, + .init = 0, + .scan_bus = pci_domain_scan_bus, +}; static void cpu_bus_init(device_t dev) { - initialize_cpus(&dev->link[0]); + initialize_cpus(&dev->link[0]); } static void cpu_bus_noop(device_t dev) @@ -234,25 +236,24 @@ static void cpu_bus_noop(device_t dev) } static const struct device_operations cpu_bus_ops = { - .read_resources = cpu_bus_noop, - .set_resources = cpu_bus_noop, - .enable_resources = cpu_bus_noop, - .init = cpu_bus_init, - .scan_bus = 0, + .read_resources = cpu_bus_noop, + .set_resources = cpu_bus_noop, + .enable_resources = cpu_bus_noop, + .init = cpu_bus_init, + .scan_bus = 0, }; static void enable_dev(struct device *dev) { printk_spew("In cn700 enable_dev for device %s.\n", dev_path(dev)); - /* Set the operations if it is a special bus type */ - if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { - dev->ops = &pci_domain_ops; + /* Set the operations if it is a special bus type. */ + if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { + dev->ops = &pci_domain_ops; pci_set_method(dev); - } - else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { - dev->ops = &cpu_bus_ops; - } + } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { + dev->ops = &cpu_bus_ops; + } } struct chip_operations northbridge_via_cn700_ops = { diff --git a/src/northbridge/via/cn700/raminit.c b/src/northbridge/via/cn700/raminit.c index 20efdea8cd..715305268e 100644 --- a/src/northbridge/via/cn700/raminit.c +++ b/src/northbridge/via/cn700/raminit.c @@ -25,7 +25,7 @@ #include <delay.h> #include "cn700.h" -//#define DEBUG_RAM_SETUP 1 +// #define DEBUG_RAM_SETUP 1 #ifdef DEBUG_RAM_SETUP #define PRINT_DEBUG_MEM(x) print_debug(x) @@ -60,16 +60,16 @@ static void do_ram_command(device_t dev, u8 command) } /** - * Configure the bus between the cpu and the northbridge. This might be able to + * Configure the bus between the CPU and the northbridge. This might be able to * be moved to post-ram code in the future. For the most part, these registers * should not be messed around with. These are too complex to explain short of * copying the datasheets into the comments, but most of these values are from * the BIOS Porting Guide, so they should work on any board. If they don't, * try the values from your factory BIOS. * - * TODO: Changing the DRAM frequency doesn't work (hard lockup) + * TODO: Changing the DRAM frequency doesn't work (hard lockup). * - * @param dev The northbridge's CPU Host Interface (D0F2) + * @param dev The northbridge's CPU Host Interface (D0F2). */ static void c7_cpu_setup(device_t dev) { @@ -87,13 +87,15 @@ static void c7_cpu_setup(device_t dev) /* Write Policy */ pci_write_config8(dev, 0x56, 0x01); /* Miscellaneous Control */ - /* DRAM Operating Frequency (Bits 7:5) - * 000 : 100MHz 001 : 133MHz - * 010 : 166MHz 011 : 200MHz - * 100 : 266MHz 101 : 333MHz - * 110/111 : Reserved */ + /* + * DRAM Operating Frequency (bits 7:5) + * 000 : 100MHz 001 : 133MHz + * 010 : 166MHz 011 : 200MHz + * 100 : 266MHz 101 : 333MHz + * 110/111 : Reserved + */ /* CPU Miscellaneous Control */ - pci_write_config8(dev, 0x59, 0x44); + pci_write_config8(dev, 0x59, 0x44); /* Write Policy */ pci_write_config8(dev, 0x5d, 0xb2); /* Bandwidth Timer */ @@ -112,8 +114,8 @@ static void c7_cpu_setup(device_t dev) /* Read Line Burst DRDY# Timing Control */ pci_write_config8(dev, 0x66, 0xff); pci_write_config8(dev, 0x67, 0x30); - - /* Host Bus IO Circuit (See datasheet) */ + + /* Host Bus I/O Circuit (see datasheet) */ /* Host Address Pullup/down Driving */ pci_write_config8(dev, 0x70, 0x11); pci_write_config8(dev, 0x71, 0x11); @@ -133,7 +135,7 @@ static void c7_cpu_setup(device_t dev) pci_write_config8(dev, 0x79, 0xaa); /* Address Strobe Input Delay Control */ pci_write_config8(dev, 0x7a, 0x24); - // Address CKG Rising/Falling Time Control + /* Address CKG Rising/Falling Time Control */ pci_write_config8(dev, 0x7b, 0xaa); /* Address CKG Clock Rising/Falling Time Control */ pci_write_config8(dev, 0x7c, 0x00); @@ -148,10 +150,10 @@ static void c7_cpu_setup(device_t dev) } /** - * Set up dram size according to spd data. Eventually, DRAM timings should be + * Set up DRAM size according to SPD data. Eventually, DRAM timings should be * done in a similar manner. * - * @param ctrl The northbridge devices and spd addresses. + * @param ctrl The northbridge devices and SPD addresses. */ static void sdram_set_size(const struct mem_controller *ctrl) { @@ -159,37 +161,37 @@ static void sdram_set_size(const struct mem_controller *ctrl) ranks = spd_read_byte(ctrl->channel0[0], SPD_NUM_DIMM_BANKS); ranks = (ranks & 0x07) + 1; - density = spd_read_byte(ctrl->channel0[0], SPD_DENSITY_OF_EACH_ROW_ON_MODULE); - switch (density) - { - case 0x80: - result = 0x08; /* 512MB / 64MB = 0x08 */ - break; - case 0x40: - result = 0x04; - break; - case 0x20: - result = 0x02; - break; - case 0x10: - result = 0xff; /* 16GB */ - break; - case 0x08: - result = 0xff; /* 8GB */ - break; - case 0x04: - result = 0xff; /* 4GB */ - break; - case 0x02: - result = 0x20; /* 2GB */ - break; - case 0x01: - result = 0x10; /* 1GB */ - break; + density = spd_read_byte(ctrl->channel0[0], + SPD_DENSITY_OF_EACH_ROW_ON_MODULE); + switch (density) { + case 0x80: + result = 0x08; /* 512MB / 64MB = 0x08 */ + break; + case 0x40: + result = 0x04; + break; + case 0x20: + result = 0x02; + break; + case 0x10: + result = 0xff; /* 16GB */ + break; + case 0x08: + result = 0xff; /* 8GB */ + break; + case 0x04: + result = 0xff; /* 4GB */ + break; + case 0x02: + result = 0x20; /* 2GB */ + break; + case 0x01: + result = 0x10; /* 1GB */ + break; } if (result == 0xff) - die("dram module size too big, not supported by cn700\r\n"); + die("DRAM module size too big, not supported by CN700\r\n"); pci_write_config8(ctrl->d0f3, 0x40, result); pci_write_config8(ctrl->d0f3, 0x48, 0x00); @@ -197,7 +199,7 @@ static void sdram_set_size(const struct mem_controller *ctrl) pci_write_config8(ctrl->d0f3, 0x41, result * ranks); pci_write_config8(ctrl->d0f3, 0x49, result); } - /* size mirror */ + /* Size mirror */ pci_write_config8(ctrl->d0f7, 0xe5, (result * ranks) << 2); pci_write_config8(ctrl->d0f7, 0x57, (result * ranks) << 2); /* Low Top Address */ @@ -207,55 +209,53 @@ static void sdram_set_size(const struct mem_controller *ctrl) /* Physical-Virtual Mapping */ if (ranks == 2) - pci_write_config8(ctrl->d0f3, 0x54, 1 << 7 | 0 << 4 | 1 << 3 | 1 << 0); + pci_write_config8(ctrl->d0f3, 0x54, + 1 << 7 | 0 << 4 | 1 << 3 | 1 << 0); if (ranks == 1) pci_write_config8(ctrl->d0f3, 0x54, 1 << 7 | 0 << 4); pci_write_config8(ctrl->d0f3, 0x55, 0x00); - /* virtual rank interleave, disable */ + /* Virtual rank interleave, disable */ pci_write_config32(ctrl->d0f3, 0x58, 0x00); /* MA Map Type */ result = spd_read_byte(ctrl->channel0[0], SPD_NUM_BANKS_PER_SDRAM); if (result == 8) { col = spd_read_byte(ctrl->channel0[0], SPD_NUM_COLUMNS); - switch (col) - { - case 10: - pci_write_config8(ctrl->d0f3, 0x50, 0xa0); - break; - case 11: - pci_write_config8(ctrl->d0f3, 0x50, 0xc0); - break; - case 12: - pci_write_config8(ctrl->d0f3, 0x50, 0xe0); - break; + switch (col) { + case 10: + pci_write_config8(ctrl->d0f3, 0x50, 0xa0); + break; + case 11: + pci_write_config8(ctrl->d0f3, 0x50, 0xc0); + break; + case 12: + pci_write_config8(ctrl->d0f3, 0x50, 0xe0); + break; } - } - else if (result == 4) { + } else if (result == 4) { col = spd_read_byte(ctrl->channel0[0], SPD_NUM_COLUMNS); - switch (col) - { - case 9: - pci_write_config8(ctrl->d0f3, 0x50, 0x00); - break; - case 10: - pci_write_config8(ctrl->d0f3, 0x50, 0x20); - break; - case 11: - pci_write_config8(ctrl->d0f3, 0x50, 0x40); - break; - case 12: - pci_write_config8(ctrl->d0f3, 0x50, 0x60); - break; + switch (col) { + case 9: + pci_write_config8(ctrl->d0f3, 0x50, 0x00); + break; + case 10: + pci_write_config8(ctrl->d0f3, 0x50, 0x20); + break; + case 11: + pci_write_config8(ctrl->d0f3, 0x50, 0x40); + break; + case 12: + pci_write_config8(ctrl->d0f3, 0x50, 0x60); + break; } } pci_write_config8(ctrl->d0f3, 0x51, 0x00); } /** - * Set up various ram and other control registers statically. Some of these may - * not be needed, other should be done with spd info, but that's a project for - * the future + * Set up various RAM and other control registers statically. Some of these may + * not be needed, other should be done with SPD info, but that's a project for + * the future. */ static void sdram_set_registers(const struct mem_controller *ctrl) { @@ -265,48 +265,49 @@ static void sdram_set_registers(const struct mem_controller *ctrl) pci_write_config8(ctrl->d0f3, 0x61, 0xe0); /* Set CAS=4 */ pci_write_config8(ctrl->d0f3, 0x62, 0xfa); - /* dram timing-3 */ + /* DRAM timing-3 */ pci_write_config8(ctrl->d0f3, 0x63, 0xca); - /* dram timing-4 */ + /* DRAM timing-4 */ pci_write_config8(ctrl->d0f3, 0x64, 0xcc); /* DIMM command / Address Selection */ pci_write_config8(ctrl->d0f3, 0x67, 0x00); /* Disable cross bank/multi page mode */ pci_write_config8(ctrl->d0f3, 0x69, 0x00); - /* disable refresh now */ + /* Disable refresh now */ pci_write_config8(ctrl->d0f3, 0x6a, 0x00); - /* frequency 100MHZ */ + /* Frequency 100 MHz */ pci_write_config8(ctrl->d0f3, 0x90, 0x00); pci_write_config8(ctrl->d0f2, 0x57, 0x18); - /* Allow manual dll reset */ + /* Allow manual DLL reset */ pci_write_config8(ctrl->d0f3, 0x6b, 0x10); /* Bank/Rank Interleave Address Select */ pci_write_config8(ctrl->d0f3, 0x52, 0x33); pci_write_config8(ctrl->d0f3, 0x53, 0x3f); - - /* Set to DDR2 sdram, BL=8 (0xc8, 0xc0 for bl=4) */ + + /* Set to DDR2 SDRAM, BL=8 (0xc8, 0xc0 for bl=4) */ pci_write_config8(ctrl->d0f3, 0x6c, 0xc8); /* DRAM Bus Turn-Around Setting */ pci_write_config8(ctrl->d0f3, 0x60, 0x03); /* DRAM Arbitration Control */ pci_write_config8(ctrl->d0f3, 0x66, 0x80); - /* DQS Tuning: testing on a couple different boards has shown this is + /* + * DQS Tuning: testing on a couple different boards has shown this is * static, or close enough that it can be. Which is good, because the - * tuning function used too many registers + * tuning function used too many registers. */ - /* DQS Output Delay for CHannel A */ + /* DQS Output Delay for Channel A */ pci_write_config8(ctrl->d0f3, 0x70, 0x00); /* MD Output Delay for Channel A */ pci_write_config8(ctrl->d0f3, 0x71, 0x01); pci_write_config8(ctrl->d0f3, 0x73, 0x01); - /* dram arbitration timer */ + /* DRAM arbitration timer */ pci_write_config8(ctrl->d0f3, 0x65, 0xd9); - /* dram signal timing control */ + /* DRAM signal timing control */ pci_write_config8(ctrl->d0f3, 0x74, 0x01); pci_write_config8(ctrl->d0f3, 0x75, 0x01); pci_write_config8(ctrl->d0f3, 0x76, 0x06); @@ -316,7 +317,7 @@ static void sdram_set_registers(const struct mem_controller *ctrl) pci_write_config8(ctrl->d0f3, 0x7a, 0x00); pci_write_config8(ctrl->d0f3, 0x7b, 0x10); - /* dram clocking control */ + /* DRAM clocking control */ pci_write_config8(ctrl->d0f3, 0x91, 0x01); /* CS/CKE Clock Phase Control */ pci_write_config8(ctrl->d0f3, 0x92, 0x02); @@ -325,18 +326,18 @@ static void sdram_set_registers(const struct mem_controller *ctrl) /* DCLKO Feedback Mode Output Control */ pci_write_config8(ctrl->d0f3, 0x94, 0x00); pci_write_config8(ctrl->d0f3, 0x9d, 0x0f); - + /* SDRAM ODT Control */ pci_write_config8(ctrl->d0f3, 0xda, 0x80); /* Channel A DQ/DQS CKG Output Delay Control */ pci_write_config8(ctrl->d0f3, 0xdc, 0x54); /* Channel A DQ/DQS CKG Output Delay Control */ pci_write_config8(ctrl->d0f3, 0xdd, 0x55); - /* odt lookup table */ + /* ODT lookup table */ pci_write_config8(ctrl->d0f3, 0xd8, 0x01); pci_write_config8(ctrl->d0f3, 0xd9, 0x0a); - /* ddr sdram control */ + /* DDR SDRAM control */ pci_write_config8(ctrl->d0f3, 0x6d, 0xc0); pci_write_config8(ctrl->d0f3, 0x6f, 0x41); @@ -344,7 +345,7 @@ static void sdram_set_registers(const struct mem_controller *ctrl) pci_write_config8(ctrl->d0f3, 0xd0, 0xaa); /* Compensation Control */ - pci_write_config8(ctrl->d0f3, 0xd3, 0x01); /*enable auto compensation*/ + pci_write_config8(ctrl->d0f3, 0xd3, 0x01); /* Enable autocompensation */ /* ODT (some are set with driving select above) */ pci_write_config8(ctrl->d0f3, 0xd4, 0x80); pci_write_config8(ctrl->d0f3, 0xd5, 0x8a); @@ -362,8 +363,8 @@ static void sdram_set_registers(const struct mem_controller *ctrl) pci_write_config8(ctrl->d0f3, 0xee, 0x00); /* DQS CKG Input Delay Control */ pci_write_config8(ctrl->d0f3, 0xef, 0x10); - - /* dram duty control */ + + /* DRAM duty control */ pci_write_config8(ctrl->d0f3, 0xed, 0x10); /* SMM and APIC decoding, we do not use SMM */ @@ -372,23 +373,23 @@ static void sdram_set_registers(const struct mem_controller *ctrl) /* SMM and APIC decoding mirror */ pci_write_config8(ctrl->d0f7, 0xe6, reg); - /* dram module configuration */ + /* DRAM module configuration */ pci_write_config8(ctrl->d0f3, 0x6e, 0x89); } static void sdram_set_post(const struct mem_controller *ctrl) { device_t dev = ctrl->d0f3; + /* Enable multipage mode. */ pci_write_config8(dev, 0x69, 0x03); /* Enable refresh. */ pci_write_config8(dev, 0x6a, 0x32); - // vga device - pci_write_config16(dev, 0xa0, (1 <<15)); + /* VGA device. */ + pci_write_config16(dev, 0xa0, (1 << 15)); pci_write_config16(dev, 0xa4, 0x0010); - } static void sdram_enable(device_t dev, unsigned long rank_address) @@ -410,33 +411,35 @@ static void sdram_enable(device_t dev, unsigned long rank_address) /* 3. Mode register set. */ PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n"); do_ram_command(dev, RAM_COMMAND_MRS); - read32(rank_address + 0x120000);// EMRS DLL Enable - read32(rank_address + 0x800); // MRS DLL Reset - + read32(rank_address + 0x120000); /* EMRS DLL Enable */ + read32(rank_address + 0x800); /* MRS DLL Reset */ + /* 4. Precharge all again. */ PRINT_DEBUG_MEM("RAM Enable 2: Precharge all\r\n"); do_ram_command(dev, RAM_COMMAND_PRECHARGE); read32(rank_address + 0x0); - + /* 5. Perform 8 refresh cycles. Wait tRC each time. */ PRINT_DEBUG_MEM("RAM Enable 3: CBR\r\n"); do_ram_command(dev, RAM_COMMAND_CBR); - for(i = 0; i < 8; i++) { + for (i = 0; i < 8; i++) { read32(rank_address + 0x20); udelay(100); } /* 6. Mode register set. */ PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n"); - //safe value for now, BL=8, WR=5, CAS=4 - /* (E)MRS values are from the BPG. No direct explanation is given, but + /* Safe value for now, BL=8, WR=5, CAS=4 */ + /* + * (E)MRS values are from the BPG. No direct explanation is given, but * they should somehow conform to the JEDEC DDR2 SDRAM Specification - * (JESD79-2C). */ + * (JESD79-2C). + */ do_ram_command(dev, RAM_COMMAND_MRS); - read32(rank_address + 0x002258); // MRS command - read32(rank_address + 0x121c20); // EMRS OCD Default - read32(rank_address + 0x120020); // EMRS OCD Calibration Mode Exit - + read32(rank_address + 0x002258); /* MRS command */ + read32(rank_address + 0x121c20); /* EMRS OCD Default */ + read32(rank_address + 0x120020); /* EMRS OCD Calibration Mode Exit */ + /* 8. Normal operation */ PRINT_DEBUG_MEM("RAM Enable 5: Normal operation\r\n"); do_ram_command(dev, RAM_COMMAND_NORMAL); @@ -444,7 +447,7 @@ static void sdram_enable(device_t dev, unsigned long rank_address) } /* - * Support one dimm with up to 2 ranks + * Support one DIMM with up to 2 ranks. */ static void ddr_ram_setup(const struct mem_controller *ctrl) { @@ -456,7 +459,7 @@ static void ddr_ram_setup(const struct mem_controller *ctrl) sdram_enable(ctrl->d0f3, 0); reg = pci_read_config8(ctrl->d0f3, 0x41); if (reg != 0) - sdram_enable(ctrl->d0f3, pci_read_config8(ctrl->d0f3, 0x40) << 26); + sdram_enable(ctrl->d0f3, + pci_read_config8(ctrl->d0f3, 0x40) << 26); sdram_set_post(ctrl); } - diff --git a/src/northbridge/via/cn700/raminit.h b/src/northbridge/via/cn700/raminit.h index c2a2ec85d6..64f8db4fb4 100644 --- a/src/northbridge/via/cn700/raminit.h +++ b/src/northbridge/via/cn700/raminit.h @@ -21,9 +21,11 @@ #ifndef RAMINIT_H #define RAMINIT_H -#define DIMM_SOCKETS 1 //Only one works, for now. +#define DIMM_SOCKETS 1 /* Only one works, for now. */ struct mem_controller { device_t d0f0, d0f2, d0f3, d0f4, d0f7, d1f0; u8 channel0[DIMM_SOCKETS]; }; + +#endif diff --git a/src/northbridge/via/cn700/vga.c b/src/northbridge/via/cn700/vga.c index f00f18dda0..11bcb1e0eb 100644 --- a/src/northbridge/via/cn700/vga.c +++ b/src/northbridge/via/cn700/vga.c @@ -18,8 +18,10 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -/* Note: Some of the VGA control registers are located on the memory controller. - Registers are set both in raminit.c and northbridge.c */ +/* + * Note: Some of the VGA control registers are located on the memory + * controller. Registers are set both in raminit.c and northbridge.c. + */ #include <console/console.h> #include <arch/io.h> @@ -37,75 +39,74 @@ void write_protect_vgabios(void) { -//Don't bother for now + /* Don't bother for now. */ } static void vga_init(device_t dev) { u8 reg8; - print_debug("Copying BOCHS Bios to 0xf000\n"); - /* Copy BOCHS BIOS from 4G-ROM_SIZE-64k (in flash) to 0xf0000 (in RAM) - * This is for compatibility with the VGA ROM's BIOS callbacks */ + print_debug("Copying BOCHS BIOS to 0xf000\n"); + /* + * Copy BOCHS BIOS from 4G-ROM_SIZE-64k (in flash) to 0xf0000 (in RAM) + * This is for compatibility with the VGA ROM's BIOS callbacks. + */ memcpy(0xf0000, (0xffffffff - ROM_SIZE - 0xffff), 0x10000); printk_debug("Initializing VGA\n"); - - /* Set memory rate to 200MHz */ + + /* Set memory rate to 200 MHz. */ outb(0x3d, CRTM_INDEX); reg8 = inb(CRTM_DATA); reg8 &= 0x0f; reg8 |= (0x1 << 4); outb(0x3d, CRTM_INDEX); outb(reg8, CRTM_DATA); - - /* Set framebuffer size */ + + /* Set framebuffer size. */ reg8 = (CONFIG_VIDEO_MB / 4); outb(0x39, SR_INDEX); outb(reg8, SR_DATA); - - + pci_write_config8(dev, 0x04, 0x07); pci_write_config8(dev, 0x0d, 0x20); - pci_write_config32(dev,0x10, 0xf4000008); - pci_write_config32(dev,0x14, 0xfb000000); - - + pci_write_config32(dev, 0x10, 0xf4000008); + pci_write_config32(dev, 0x14, 0xfb000000); + printk_debug("INSTALL REAL-MODE IDT\n"); setup_realmode_idt(); printk_debug("DO THE VGA BIOS\n"); do_vgabios(); - /* VGA seems to work without this, but crash & burn with it */ - //printk_debug("Enable VGA console\n"); - //vga_enable_console(); + /* VGA seems to work without this, but crash & burn with it. */ + // printk_debug("Enable VGA console\n"); + // vga_enable_console(); /* It's not clear if these need to be programmed before or after - * the VGA bios runs. Try both, clean up later */ - /* Set memory rate to 200MHz */ + * the VGA BIOS runs. Try both, clean up later. */ + /* Set memory rate to 200 MHz (again). */ outb(0x3d, CRTM_INDEX); reg8 = inb(CRTM_DATA); reg8 &= 0x0f; reg8 |= (0x1 << 4); outb(0x3d, CRTM_INDEX); outb(reg8, CRTM_DATA); - - /* Set framebuffer size (again) */ + + /* Set framebuffer size (again). */ reg8 = (CONFIG_VIDEO_MB / 4); outb(0x39, SR_INDEX); outb(reg8, SR_DATA); - /* Clear the BOCHs Bios out of memory, so it doesn't confuse linux */ + /* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */ memset(0xf0000, 0, 0x10000); } static void vga_read_resources(device_t dev) { dev->rom_address = 0xfff80000; - dev->on_mainboard=1; + dev->on_mainboard = 1; pci_dev_read_resources(dev); } - static const struct device_operations vga_operations = { .read_resources = vga_read_resources, .set_resources = pci_dev_set_resources, @@ -115,7 +116,7 @@ static const struct device_operations vga_operations = { }; static const struct pci_driver vga_driver __pci_driver = { - .ops = &vga_operations, + .ops = &vga_operations, .vendor = PCI_VENDOR_ID_VIA, .device = PCI_DEVICE_ID_VIA_CN700_VGA, }; |