[Qemu-devel] [RFC v3 11/11] prep: Add pc87312 Super I/O emulation

[Andreas Färber]

Signed-off-by: Hervé Poussineau <address@hidden>

Create all devices ahead of time and enable/disable instead.
Check the qdev properties for whether a change is necessary.

Signed-off-by: Andreas Färber <address@hidden>
---
 Makefile.objs                   |    1 +
 default-configs/ppc-softmmu.mak |    2 +
 hw/pc87312.c                    |  462 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 465 insertions(+), 0 deletions(-)
 create mode 100644 hw/pc87312.c

diff --git a/Makefile.objs b/Makefile.objs
index 90838f6..4729063 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -206,6 +206,7 @@ hw-obj-$(CONFIG_SMARTCARD_NSS) += ccid-card-emulated.o
 # PPC devices
 hw-obj-$(CONFIG_OPENPIC) += openpic.o
 hw-obj-$(CONFIG_PREP_PCI) += prep_pci.o
+hw-obj-$(CONFIG_PC87312) += pc87312.o
 # Mac shared devices
 hw-obj-$(CONFIG_MACIO) += macio.o
 hw-obj-$(CONFIG_CUDA) += cuda.o
diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.mak
index 4563742..4b3ebec 100644
--- a/default-configs/ppc-softmmu.mak
+++ b/default-configs/ppc-softmmu.mak
@@ -7,12 +7,14 @@ CONFIG_ESCC=y
 CONFIG_M48T59=y
 CONFIG_VGA_PCI=y
 CONFIG_SERIAL=y
+CONFIG_PARALLEL=y
 CONFIG_I8254=y
 CONFIG_PCKBD=y
 CONFIG_FDC=y
 CONFIG_DMA=y
 CONFIG_OPENPIC=y
 CONFIG_PREP_PCI=y
+CONFIG_PC87312=y
 CONFIG_MACIO=y
 CONFIG_CUDA=y
 CONFIG_ADB=y
diff --git a/hw/pc87312.c b/hw/pc87312.c
new file mode 100644
index 0000000..7296019
--- /dev/null
+++ b/hw/pc87312.c
@@ -0,0 +1,462 @@
+/*
+ * QEMU National Semiconductor PC87312 (Super I/O)
+ *
+ * Copyright (c) 2010 Herve Poussineau
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to 
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "isa.h"
+#include "fdc.h"
+#include "ide.h"
+
+//#define DEBUG_PC87312
+
+#ifdef DEBUG_PC87312
+#define DPRINTF(fmt, ...) \
+do { fprintf(stderr, "pc87312: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+do {} while (0)
+#endif
+
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "pc87312 ERROR: " fmt , ## __VA_ARGS__); } while (0)
+
+#define REG_FER 0
+#define REG_FAR 1
+#define REG_PTR 2
+
+#define FER regs[REG_FER]
+#define FAR regs[REG_FAR]
+#define PTR regs[REG_PTR]
+
+#define FER_PARALLEL_EN   0x01
+#define FER_UART1_EN      0x02
+#define FER_UART2_EN      0x04
+#define FER_FDC_EN        0x08
+#define FER_FDC_4         0x10
+#define FER_FDC_ADDR      0x20
+#define FER_IDE_EN        0x40
+#define FER_IDE_ADDR      0x80
+
+#define FAR_PARALLEL_ADDR 0x03
+#define FAR_UART1_ADDR    0x0C
+#define FAR_UART2_ADDR    0x30
+#define FAR_UART_3_4      0xC0
+
+#define PTR_POWER_DOWN    0x01
+#define PTR_CLOCK_DOWN    0x02
+#define PTR_PWDN          0x04
+#define PTR_IRQ_5_7       0x08
+#define PTR_UART1_TEST    0x10
+#define PTR_UART2_TEST    0x20
+#define PTR_LOCK_CONF     0x40
+#define PTR_EPP_MODE      0x80
+
+typedef struct PC87312State {
+    uint8_t config; /* initial configuration */
+
+    struct {
+        DeviceState *dev;
+        CharDriverState *chr;
+    } parallel;
+
+    struct {
+        DeviceState *dev;
+        CharDriverState *chr;
+    } uart[2];
+
+    struct {
+        DeviceState *dev;
+        BlockDriverState *drive[2];
+        uint32_t base;
+    } fdc;
+
+    struct {
+        DeviceState *dev;
+        uint32_t base;
+    } ide;
+
+    uint8_t read_id_step;
+    uint8_t selected_index;
+
+    uint8_t regs[3];
+} PC87312State;
+
+
+/* Parallel port */
+
+static inline bool is_parallel_enabled(PC87312State *s)
+{
+    return s->FER & FER_PARALLEL_EN;
+}
+
+static const uint32_t parallel_base[] = { 0x378, 0x3bc, 0x278, 0x00 };
+
+static inline uint32_t get_parallel_iobase(PC87312State *s)
+{
+    return parallel_base[s->FAR & FAR_PARALLEL_ADDR];
+}
+
+static const uint32_t parallel_irq[] = { 5, 7, 5, 0 };
+
+static inline uint32_t get_parallel_irq(PC87312State *s)
+{
+    int idx;
+    idx = (s->FAR & FAR_PARALLEL_ADDR);
+    if (idx == 0) {
+        return (s->PTR & PTR_IRQ_5_7) ? 7 : 5;
+    } else {
+        return parallel_irq[idx];
+    }
+}
+
+static inline bool is_parallel_epp(PC87312State *s)
+{
+    return (s->PTR & PTR_EPP_MODE);
+}
+
+static void update_parallel(PC87312State *s)
+{
+    ISADevice *isa;
+    uint32_t base, isairq;
+
+    if (s->parallel.dev != NULL) {
+        isa = DO_UPCAST(ISADevice, qdev, s->parallel.dev);
+        base = get_parallel_iobase(s);
+        isairq = get_parallel_irq(s);
+        // TODO check for state change
+        if (qdev_prop_get_uint32(&isa->qdev, "iobase") != base ||
+            qdev_prop_get_uint32(&isa->qdev, "irq") != isairq) {
+            isa_set_state(isa, false);
+            qdev_prop_set_uint32(&isa->qdev, "iobase", base);
+            qdev_prop_set_uint32(&isa->qdev, "irq", isairq);
+            if (is_parallel_enabled(s)) {
+                isa_set_state(isa, true);
+            }
+        }
+    }
+}
+
+
+/* UARTs */
+
+static const uint32_t uart_base[2][4] = {
+    { 0x3e8, 0x338, 0x2e8, 0x220 },
+    { 0x2e8, 0x238, 0x2e0, 0x228 }
+};
+
+static inline uint32_t get_uart_iobase(PC87312State *s, int i)
+{
+    int idx;
+    idx = (s->FAR >> (2 * i + 2)) & 0x3;
+    if (idx == 0) {
+        return 0x3f8;
+    } else if (idx == 1) {
+        return 0x2f8;
+    } else {
+        return uart_base[idx & 1][(s->FAR & FAR_UART_3_4) >> 6];
+    }
+}
+
+static inline uint32_t get_uart_irq(PC87312State *s, int i)
+{
+    int idx;
+    idx = (s->FAR >> (2 * i + 2)) & 0x3;
+    return (idx & 1) ? 3 : 4;
+}
+
+static inline bool is_uart_enabled(PC87312State *s, int i)
+{
+    return s->FER & (FER_UART1_EN << i);
+}
+
+static void update_uarts(PC87312State *s)
+{
+    ISADevice *isa;
+    uint32_t base, isairq;
+    int i;
+
+    for (i = 0; i < 2; i++) {
+        if (s->uart[i].dev != NULL) {
+            isa = DO_UPCAST(ISADevice, qdev, s->parallel.dev);
+            base = get_uart_iobase(s, i);
+            isairq = get_uart_irq(s, i);
+            // TODO check for state change
+            if (qdev_prop_get_uint32(&isa->qdev, "iobase") != base ||
+                qdev_prop_get_uint32(&isa->qdev, "irq") != isairq) {
+                isa_set_state(isa, false);
+                qdev_prop_set_uint32(&isa->qdev, "iobase", base);
+                qdev_prop_set_uint32(&isa->qdev, "irq", isairq);
+                if (is_uart_enabled(s, i)) {
+                    isa_set_state(isa, true);
+                }
+            }
+        }
+    }
+}
+
+
+/* Floppy controller */
+
+static inline bool is_fdc_enabled(PC87312State *s)
+{
+    return (s->FER & FER_FDC_EN);
+}
+
+static inline uint32_t get_fdc_iobase(PC87312State *s)
+{
+    return (s->FER & FER_FDC_ADDR) ? 0x370 : 0x3f0;
+}
+
+static void update_fdc(PC87312State *s)
+{
+    ISADevice *isa = DO_UPCAST(ISADevice, qdev, s->fdc.dev);
+    uint32_t base;
+
+    base = get_fdc_iobase(s);
+    // TODO check for state change
+    if (qdev_prop_get_uint32(&isa->qdev, "iobase") != base) {
+        isa_set_state(isa, false);
+        qdev_prop_set_uint32(&isa->qdev, "iobase", base);
+        if (is_fdc_enabled(s)) {
+            isa_set_state(isa, true);
+        }
+    }
+}
+
+
+/* IDE controller */
+
+static inline bool is_ide_enabled(PC87312State *s)
+{
+    return (s->FER & FER_IDE_EN);
+}
+
+static inline uint32_t get_ide_iobase(PC87312State *s)
+{
+    return (s->FER & FER_IDE_ADDR) ? 0x170 : 0x1f0;
+}
+
+static void update_ide(PC87312State *s)
+{
+    ISADevice *isa = DO_UPCAST(ISADevice, qdev, s->ide.dev);
+    uint32_t base;
+
+    base = get_ide_iobase(s);
+    // TODO check for state change
+    if (qdev_prop_get_uint32(&isa->qdev, "iobase") != base) {
+        isa_set_state(isa, false);
+        qdev_prop_set_uint32(&isa->qdev, "iobase", base);
+        qdev_prop_set_uint32(&isa->qdev, "iobase2", base + 0x206);
+        if (is_ide_enabled(s)) {
+            isa_set_state(isa, true);
+        }
+    }
+}
+
+
+static void update_mappings(PC87312State *s)
+{
+    update_parallel(s);
+    update_uarts(s);
+    update_fdc(s);
+    update_ide(s);
+}
+
+static void pc87312_soft_reset(PC87312State *s)
+{
+    static const uint8_t fer_init[] = {
+        0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4b, 0x4b,
+        0x4b, 0x4b, 0x4b, 0x4b, 0x0f, 0x0f, 0x0f, 0x0f,
+        0x49, 0x49, 0x49, 0x49, 0x07, 0x07, 0x07, 0x07,
+        0x47, 0x47, 0x47, 0x47, 0x47, 0x47, 0x08, 0x00,
+    };
+    static const uint8_t far_init[] = {
+        0x10, 0x11, 0x11, 0x39, 0x24, 0x38, 0x00, 0x01,
+        0x01, 0x09, 0x08, 0x08, 0x10, 0x11, 0x39, 0x24,
+        0x00, 0x01, 0x01, 0x00, 0x10, 0x11, 0x39, 0x24,
+        0x10, 0x11, 0x11, 0x39, 0x24, 0x38, 0x10, 0x10,
+    };
+    static const uint8_t ptr_init[] = {
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
+    };
+
+    s->read_id_step = 0;
+    s->selected_index = REG_FER;
+
+    s->FER = fer_init[s->config & 0x1f];
+    s->FAR = far_init[s->config & 0x1f];
+    s->PTR = ptr_init[s->config & 0x1f];
+}
+
+static void pc87312_hard_reset(PC87312State *s)
+{
+    pc87312_soft_reset(s);
+}
+
+static void pc87312_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+{
+    PC87312State *s = opaque;
+
+    DPRINTF("%s: write %x at %x\n", __func__, val, addr);
+
+    if ((addr & 1) == 0) {
+        /* Index register */
+        s->read_id_step = 2;
+        s->selected_index = val;
+    } else {
+        /* Data register */
+        if (s->selected_index < 3) {
+            s->regs[s->selected_index] = val;
+            update_mappings(s);
+        }
+    }
+}
+
+static uint32_t pc87312_ioport_read(void *opaque, uint32_t addr)
+{
+    PC87312State *s = opaque;
+    uint32_t val;
+
+    if ((addr & 1) == 0) {
+        /* Index register */
+        if (s->read_id_step++ == 0) {
+            val = 0x88;
+        } else if (s->read_id_step++ == 1) {
+            val = 0;
+        } else {
+            val = s->selected_index;
+        }
+    } else {
+        /* Data register */
+        if (s->selected_index < 3) {
+            val = s->regs[s->selected_index];
+        } else {
+            /* Invalid selected index */
+            val = 0;
+        }
+    }
+
+    DPRINTF("%s: read %x at %x\n", __func__, val, addr);
+    return val;
+}
+
+static void pc87312_init_core(PC87312State *s)
+{
+    ISADevice *isa;
+    int i;
+
+    pc87312_hard_reset(s);
+
+    if (s->parallel.chr != NULL) {
+        isa = isa_create("isa-parallel");
+        qdev_prop_set_uint32(&isa->qdev, "index", 0);
+        qdev_prop_set_uint32(&isa->qdev, "iobase", get_parallel_iobase(s));
+        qdev_prop_set_uint32(&isa->qdev, "irq", get_parallel_irq(s));
+        qdev_prop_set_chr(&isa->qdev, "chardev", s->parallel.chr);
+        qdev_init_nofail(&isa->qdev);
+        s->parallel.dev = &isa->qdev;
+    }
+
+    for (i = 0; i < 2; i++) {
+        if (s->uart[i].chr != NULL) {
+            isa = isa_create("isa-serial");
+            qdev_prop_set_uint32(&isa->qdev, "index", i);
+            qdev_prop_set_uint32(&isa->qdev, "iobase", get_uart_iobase(s, i));
+            qdev_prop_set_uint32(&isa->qdev, "irq", get_uart_irq(s, i));
+            qdev_prop_set_chr(&isa->qdev, "chardev", s->uart[i].chr);
+            qdev_init_nofail(&isa->qdev);
+            s->uart[i].dev = &isa->qdev;
+        }
+    }
+
+    isa = isa_create("isa-fdc");
+    qdev_prop_set_uint32(&isa->qdev, "iobase", get_fdc_iobase(s));
+    qdev_prop_set_uint32(&isa->qdev, "irq", 6);
+    if (s->fdc.drive[0] != NULL) {
+        qdev_prop_set_drive_nofail(&isa->qdev, "driveA", s->fdc.drive[0]);
+    }
+    if (s->fdc.drive[1] != NULL) {
+        qdev_prop_set_drive_nofail(&isa->qdev, "driveB", s->fdc.drive[1]);
+    }
+    qdev_init_nofail(&isa->qdev);
+    s->fdc.dev = &isa->qdev;
+
+    isa = isa_create("isa-ide");
+    qdev_prop_set_uint32(&isa->qdev, "iobase", get_ide_iobase(s));
+    qdev_prop_set_uint32(&isa->qdev, "iobase2", get_ide_iobase(s) + 0x206);
+    qdev_prop_set_uint32(&isa->qdev, "irq", 14);
+    qdev_init_nofail(&isa->qdev);
+    s->ide.dev = &isa->qdev;
+
+    update_mappings(s);
+}
+
+typedef struct ISAPC87312State {
+    ISADevice dev;
+    uint32_t iobase;
+    PC87312State state;
+} ISAPC87312State;
+
+static void isa_pc87312_reset(DeviceState *d)
+{
+    PC87312State *s = &container_of(d, ISAPC87312State, dev.qdev)->state;
+    pc87312_soft_reset(s);
+}
+
+static int isa_pc87312_init(ISADevice *dev)
+{
+    ISAPC87312State *isa = DO_UPCAST(ISAPC87312State, dev, dev);
+    PC87312State *s = &isa->state;
+
+    pc87312_init_core(s);
+
+    register_ioport_write(isa->iobase, 2, 1, pc87312_ioport_write, s);
+    register_ioport_read(isa->iobase, 2, 1, pc87312_ioport_read, s);
+    return 0;
+}
+
+static ISADeviceInfo pc87312_isa_info = {
+    .qdev.name = "isa-pc87312",
+    .qdev.size = sizeof(ISAPC87312State),
+    .qdev.reset = isa_pc87312_reset,
+    .init = isa_pc87312_init,
+    .qdev.props = (Property[]) {
+        DEFINE_PROP_HEX32("iobase", ISAPC87312State, iobase, 0x398),
+        DEFINE_PROP_UINT8("config", ISAPC87312State, state.config, 1),
+        DEFINE_PROP_CHR("parallel", ISAPC87312State, state.parallel.chr),
+        DEFINE_PROP_CHR("uart1", ISAPC87312State, state.uart[0].chr),
+        DEFINE_PROP_CHR("uart2", ISAPC87312State, state.uart[1].chr),
+        DEFINE_PROP_DRIVE("floppyA", ISAPC87312State, state.fdc.drive[0]),
+        DEFINE_PROP_DRIVE("floppyB", ISAPC87312State, state.fdc.drive[1]),
+        DEFINE_PROP_END_OF_LIST()
+    },
+};
+
+static void pc87312_register_devices(void)
+{
+    isa_qdev_register(&pc87312_isa_info);
+}
+
+device_init(pc87312_register_devices)
-- 
1.7.5.3