Add PCI IDE driver (only PIO mode, no DMA yet.)

4 files changed, 155 insertions, 9 deletions

diff --git a/src/kernel/include/dev/ata.h b/src/kernel/include/dev/ata.h
deleted file mode 100644
index c0a4bff..0000000
--- a/src/kernel/include/dev/ata.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#include <vfs.h>
-
-
-
-/* vim: set ts=4 sw=4 tw=0 noet :*/
diff --git a/src/kernel/include/dev/pci.h b/src/kernel/include/dev/pci.h
index 9fe0f3b..c1dfa99 100644
--- a/src/kernel/include/dev/pci.h
+++ b/src/kernel/include/dev/pci.h
@@ -12,11 +12,18 @@
 #define PCI_IRQ_NETWORK 11
 #define PCI_IRQ_DISABLE 0xFF
 
-#define PCI_CONFIG_DEVICE_ID 0x02
 #define PCI_CONFIG_VENDOR_ID 0x00
+#define PCI_CONFIG_DEVICE_ID 0x02
+#define PCI_CONFIG_PROG_IF 0x09
 #define PCI_CONFIG_CLASS 0x0B
 #define PCI_CONFIG_SUBCLASS 0x0A
 #define PCI_CONFIG_HEADER_TYPE 0x0E
+#define PCI_CONFIG_BAR0 0x10
+#define PCI_CONFIG_BAR1 0x14
+#define PCI_CONFIG_BAR2 0x18
+#define PCI_CONFIG_BAR3 0x1C
+#define PCI_CONFIG_BAR4 0x20
+#define PCI_CONFIG_BAR5 0x24
 #define PCI_CONFIG_SECONDARY_BUS 0x19
 #define PCI_CONFIG_INTERRUPT_LINE 0x3C
 
@@ -28,7 +35,7 @@
 #define PCI_SC_IDE 0x01
 #define PCI_SC_PCI_TO_PCI 0x04
 
-typedef void (*pci_irq_handler_t)();
+typedef void (*pci_irq_handler_t)(int dev_id);
 
 typedef struct {
 	uint8_t bus;
@@ -43,6 +50,7 @@ typedef struct {
 
 	uint8_t irq;
 	pci_irq_handler_t irq_handler;
+	void* data;		// data block for use by specific driver
 } pci_device_t;
 
 extern pci_device_t pci_devices[PCI_MAX_DEVICES];
diff --git a/src/kernel/include/dev/pciide.h b/src/kernel/include/dev/pciide.h
new file mode 100644
index 0000000..ca65ca8
--- /dev/null
+++ b/src/kernel/include/dev/pciide.h
@@ -0,0 +1,114 @@
+#pragma once
+
+#include <vfs.h>
+
+#define ATA_SR_BSY     0x80
+#define ATA_SR_DRDY    0x40
+#define ATA_SR_DF      0x20
+#define ATA_SR_DSC     0x10
+#define ATA_SR_DRQ     0x08
+#define ATA_SR_CORR    0x04
+#define ATA_SR_IDX     0x02
+#define ATA_SR_ERR     0x01
+
+#define ATA_ER_BBK      0x80
+#define ATA_ER_UNC      0x40
+#define ATA_ER_MC       0x20
+#define ATA_ER_IDNF     0x10
+#define ATA_ER_MCR      0x08
+#define ATA_ER_ABRT     0x04
+#define ATA_ER_TK0NF    0x02
+#define ATA_ER_AMNF     0x01
+
+#define ATA_CMD_READ_PIO          0x20
+#define ATA_CMD_READ_PIO_EXT      0x24
+#define ATA_CMD_READ_DMA          0xC8
+#define ATA_CMD_READ_DMA_EXT      0x25
+#define ATA_CMD_WRITE_PIO         0x30
+#define ATA_CMD_WRITE_PIO_EXT     0x34
+#define ATA_CMD_WRITE_DMA         0xCA
+#define ATA_CMD_WRITE_DMA_EXT     0x35
+#define ATA_CMD_CACHE_FLUSH       0xE7
+#define ATA_CMD_CACHE_FLUSH_EXT   0xEA
+#define ATA_CMD_PACKET            0xA0
+#define ATA_CMD_IDENTIFY_PACKET   0xA1
+#define ATA_CMD_IDENTIFY          0xEC
+
+#define ATAPI_CMD_READ       0xA8
+#define ATAPI_CMD_EJECT      0x1B
+
+#define ATA_IDENT_DEVICETYPE   0
+#define ATA_IDENT_CYLINDERS    2
+#define ATA_IDENT_HEADS        6
+#define ATA_IDENT_SECTORS      12
+#define ATA_IDENT_SERIAL       20
+#define ATA_IDENT_MODEL        54
+#define ATA_IDENT_CAPABILITIES 98
+#define ATA_IDENT_FIELDVALID   106
+#define ATA_IDENT_MAX_LBA      120
+#define ATA_IDENT_COMMANDSETS  164
+#define ATA_IDENT_MAX_LBA_EXT  200
+
+#define IDE_ATA        0x00
+#define IDE_ATAPI      0x01
+ 
+#define ATA_MASTER     0x00
+#define ATA_SLAVE      0x01
+
+#define ATA_REG_DATA       0x00
+#define ATA_REG_ERROR      0x01
+#define ATA_REG_FEATURES   0x01
+#define ATA_REG_SECCOUNT0  0x02
+#define ATA_REG_LBA0       0x03
+#define ATA_REG_LBA1       0x04
+#define ATA_REG_LBA2       0x05
+#define ATA_REG_HDDEVSEL   0x06
+#define ATA_REG_COMMAND    0x07
+#define ATA_REG_STATUS     0x07
+#define ATA_REG_SECCOUNT1  0x08
+#define ATA_REG_LBA3       0x09
+#define ATA_REG_LBA4       0x0A
+#define ATA_REG_LBA5       0x0B
+#define ATA_REG_CONTROL    0x0C
+#define ATA_REG_ALTSTATUS  0x0C
+#define ATA_REG_DEVADDRESS 0x0D
+
+// Channels:
+#define      ATA_PRIMARY      0x00
+#define      ATA_SECONDARY    0x01
+ 
+// Directions:
+#define      ATA_READ      0x00
+#define      ATA_WRITE     0x01
+
+typedef struct {
+	uint16_t base;		// IO base
+	uint16_t ctrl;		// Control base
+	uint16_t bmide;		// Bus Master IDE
+	uint8_t nIEN;		// do not use interrupt
+	uint8_t irq;		// which irq to wait for
+} ide_channels_regs_t;
+
+typedef struct {
+	uint8_t present;	// 0 : empty, 1 : present
+	uint8_t channel;	// 0 : primary, 1 : secondary
+	uint8_t drive;		// 0 : master, 1 : slave
+	uint16_t type;		// 0 : ATA, 1 : ATAPI
+	uint16_t sig;		// drive signature
+	uint16_t cap;		// features (capabilities)
+	uint32_t cmdset;	// supported command set
+	uint32_t size;		// size in sectors
+	char model[41];		// model string
+} ide_device_t;
+
+typedef struct {
+	ide_channels_regs_t channels[2];
+	ide_device_t devices[4];
+	bool irq_invoked;
+	char atapi_packet[12];
+	int pci_id;
+} ide_controller_t;
+
+void pciide_detect(fs_t *iofs);		// iofs = where to add ATA drives
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/
diff --git a/src/kernel/include/sys.h b/src/kernel/include/sys.h
index 365e709..944df96 100644
--- a/src/kernel/include/sys.h
+++ b/src/kernel/include/sys.h
@@ -15,6 +15,22 @@ static inline void outl(uint16_t port, uint32_t value) {
 	asm volatile("outl %1, %0" : : "dN"(port), "a"(value));
 }
 
+static inline void outsb(uint16_t port, const void *addr, size_t cnt) {
+	// write cnt bytes to port
+	asm volatile ("rep outsb" : "+S" (addr), "+c" (cnt) : "d" (port));
+}
+
+static inline void outsw(uint16_t port, const void *addr, size_t cnt) {
+	// write cnt words to port
+	asm volatile ("rep outsw" : "+S" (addr), "+c" (cnt) : "d" (port));
+}
+
+static inline void outsl (uint16_t port, const void *addr, size_t cnt) {
+	// write cnt longwords to port
+	asm volatile ("rep outsl" : "+S" (addr), "+c" (cnt) : "d" (port));
+}
+
+
 static inline uint8_t inb(uint16_t port) {
 	uint8_t ret;
 	asm volatile("inb %1, %0" : "=a"(ret) : "dN"(port));
@@ -33,6 +49,21 @@ static inline uint32_t inl(uint16_t port) {
 	return ret;
 }
 
+static inline void insb(uint16_t port, void *addr, size_t cnt) {
+	// read cnt bytes from port and put them at addr
+	asm volatile ("rep insb" : "+D" (addr), "+c" (cnt) : "d" (port) : "memory");
+}
+
+static inline void insw(uint16_t port, void *addr, size_t cnt) {
+	// read cnt words from port and put them at addr
+	asm volatile ("rep insw" : "+D" (addr), "+c" (cnt) : "d" (port) : "memory");
+}
+
+static inline void insl(uint16_t port, void *addr, size_t cnt) {
+	// read cnt longwords from port and put them at addr
+	asm volatile ("rep insl" : "+D" (addr), "+c" (cnt) : "d" (port) : "memory");
+}
+
 static inline void invlpg(void* addr) {
 	asm volatile("invlpg (%0)" : : "r"(addr) : "memory");
 }