[Qemu-devel] [PATCH 11/24] Add ali1543 super IO pci device.

[Tristan Gingold <gingold@adacore.com>]

This is a very partial implementation just enough for es40 firmware.

Signed-off-by: Tristan Gingold <gingold@adacore.com>
---
 hw/ali1543.c |  127 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/pci.h     |    8 ++++
 2 files changed, 135 insertions(+), 0 deletions(-)
 create mode 100644 hw/ali1543.c

diff --git a/hw/ali1543.c b/hw/ali1543.c
new file mode 100644
index 0000000..2bdb696
--- /dev/null
+++ b/hw/ali1543.c
@@ -0,0 +1,127 @@
+/*
+ * QEMU Ali 1543c emulation
+ *
+ * Copyright (c) 2009 AdaCore
+ *
+ * Written by Tristan Gingold.
+ *
+ * This work is licensed under the GNU GPL license version 2 or later.
+ *
+ */
+#include <time.h>
+#include <sys/time.h>
+#include "hw.h"
+#include "net.h"
+#include "sysemu.h"
+#include "devices.h"
+#include "boards.h"
+#include "pc.h"
+#include "isa.h"
+#include "qemu-char.h"
+#include "pci.h"
+
+struct ali1543_t {
+    PCIDevice pci;
+
+    qemu_irq *irq; /* Upstream handler. */
+    PITState *pit;
+    qemu_irq *i8259;    
+
+    /* Configuration.  */
+    enum cfg_state { CFG_SNOOP, CFG_51, CFG_EN } cfg_state;
+    unsigned char cfg_index;
+};
+
+static void ali_cfg_write(void *opaque, uint32_t addr, uint32_t val)
+{
+    ali1543_t *ali = opaque;
+
+    if ((addr & 1) == 0) {
+	switch (ali->cfg_state) {
+	case CFG_SNOOP:
+	    if (val == 0x51)
+		ali->cfg_state = CFG_51;
+	    else
+		qemu_log("ali1543-cfg: write %02x to cfg_port\n", val);
+	    break;
+	case CFG_51:
+	    if (val == 0x23)
+		ali->cfg_state = CFG_EN;
+	    else {
+		qemu_log("ali1543-cfg: write %02x to cfg_port (51)\n", val);
+		ali->cfg_state = CFG_SNOOP;
+	    }
+	    break;
+	case CFG_EN:
+	    ali->cfg_index = val;
+	    break;
+	}
+    }
+    else {
+	qemu_log("ali1543-cfg: write %02x to cfg reg %02x (addr=%x)\n",
+		 val, ali->cfg_index, addr);
+    }
+}
+
+static uint32_t ali_cfg_read(void *opaque, uint32_t addr)
+{
+    ali1543_t *ali = opaque;
+
+    if ((addr & 1) == 0) {
+	if (ali->cfg_state != CFG_EN) {
+	    qemu_log("ali1543-cfg: read fromcfg_port\n");
+	    return 0;
+	}
+	else
+	    return ali->cfg_index;
+    }
+    else {
+	qemu_log("ali1543-cfg: read from reg %02x\n", ali->cfg_index);
+	return 0;
+    }
+}
+
+ali1543_t *ali1543_init (PCIBus *bus, int devfn, qemu_irq irq)
+{
+    ali1543_t *ali;
+    uint8_t *pci_conf;
+
+    ali = (ali1543_t*)pci_register_device(bus, "Ali1543", sizeof(ali1543_t),
+					  devfn, NULL, NULL);
+
+    pci_conf = ali->pci.config;
+
+    pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_ALI);
+    pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_ALI1543);
+    pci_conf[0x08] = 0xc3; // Revision
+    pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
+    pci_conf[0x2c] = 0; // Subsystem
+    pci_conf[0x2d] = 0;
+    pci_conf[0x2e] = 0;
+    pci_conf[0x2f] = 0;
+
+    register_ioport_read(0x370, 2, 1, ali_cfg_read, ali);
+    register_ioport_write(0x370, 2, 1, ali_cfg_write, ali);
+
+    ali->i8259 = i8259_init(irq);
+
+    /* serial_init already handles NULL CharDriverState but this code adds
+       a more useful label.  */
+    if (serial_hds[0] == NULL)
+	serial_hds[0] = qemu_chr_open("com1", "nul", NULL);
+    if (serial_hds[1] == NULL)
+	serial_hds[1] = qemu_chr_open("com2", "nul", NULL);
+
+    serial_init(0x3f8, ali->i8259[4], 115200, serial_hds[0]);
+    serial_init(0x2f8, ali->i8259[3], 115200, serial_hds[1]);
+    ali->pit = pit_init(0x40, ali->i8259[0]);
+    pcspk_init(ali->pit);
+    DMA_init(0);
+
+    return ali;
+}
+
+qemu_irq ali1543_get_irq(ali1543_t *c, int n)
+{
+    return c->i8259[n];
+}
diff --git a/hw/pci.h b/hw/pci.h
index b955f39..f474d58 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -83,6 +83,9 @@ extern target_phys_addr_t pci_mem_base;
 #define PCI_VENDOR_ID_CMD                0x1095
 #define PCI_DEVICE_ID_CMD_646            0x0646
 
+#define PCI_VENDOR_ID_ALI		 0x10b9
+#define PCI_DEVICE_ID_ALI1543		 0x1533
+
 #define PCI_VENDOR_ID_REALTEK            0x10ec
 #define PCI_DEVICE_ID_REALTEK_RTL8029    0x8029
 #define PCI_DEVICE_ID_REALTEK_8139       0x8139
@@ -314,4 +317,9 @@ PCIBus *pci_apb_init(target_phys_addr_t special_base,
 PCIBus *sh_pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
                             qemu_irq *pic, int devfn_min, int nirq);
 
+/* ali1543.c */
+typedef struct ali1543_t ali1543_t;
+ali1543_t *ali1543_init (PCIBus *bus, int devfn, qemu_irq irq);
+qemu_irq ali1543_get_irq(ali1543_t *c, int n);
+
 #endif
-- 
1.6.2