[PULL 10/19] aspeed/scu: Add AST1030 support

[Cédric Le Goater]

From: Steven Lee <steven_lee@aspeedtech.com>

Per ast1030_v07.pdf, AST1030 SOC doesn't have SCU300, the pclk divider
selection is defined in SCU310[11:8].
Add a get_apb_freq function and a class init handler for ast1030.

Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220401083850.15266-7-jamin_lin@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/misc/aspeed_scu.h | 25 ++++++++++++++
 hw/misc/aspeed_scu.c         | 63 ++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+)

diff --git a/include/hw/misc/aspeed_scu.h b/include/hw/misc/aspeed_scu.h
index 6d3f86c1abab..5c7c04eedfa7 100644
--- a/include/hw/misc/aspeed_scu.h
+++ b/include/hw/misc/aspeed_scu.h
@@ -19,6 +19,7 @@ OBJECT_DECLARE_TYPE(AspeedSCUState, AspeedSCUClass, 
ASPEED_SCU)
 #define TYPE_ASPEED_2400_SCU TYPE_ASPEED_SCU "-ast2400"
 #define TYPE_ASPEED_2500_SCU TYPE_ASPEED_SCU "-ast2500"
 #define TYPE_ASPEED_2600_SCU TYPE_ASPEED_SCU "-ast2600"
+#define TYPE_ASPEED_1030_SCU TYPE_ASPEED_SCU "-ast1030"
 
 #define ASPEED_SCU_NR_REGS (0x1A8 >> 2)
 #define ASPEED_AST2600_SCU_NR_REGS (0xE20 >> 2)
@@ -45,6 +46,8 @@ struct AspeedSCUState {
 #define AST2600_A1_SILICON_REV   0x05010303U
 #define AST2600_A2_SILICON_REV   0x05020303U
 #define AST2600_A3_SILICON_REV   0x05030303U
+#define AST1030_A0_SILICON_REV   0x80000000U
+#define AST1030_A1_SILICON_REV   0x80010000U
 
 #define ASPEED_IS_AST2500(si_rev)     ((((si_rev) >> 24) & 0xff) == 0x04)
 
@@ -336,4 +339,26 @@ uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s);
 #define SCU_AST2600_H_PLL_BYPASS_EN                        (0x1 << 24)
 #define SCU_AST2600_H_PLL_OFF                              (0x1 << 23)
 
+/*
+ * SCU310   Clock Selection Register Set 4 (for Aspeed AST1030 SOC)
+ *
+ *  31     I3C Clock Source selection
+ *  30:28  I3C clock divider selection
+ *  26:24  MAC AHB clock divider selection
+ *  22:20  RGMII 125MHz clock divider ration
+ *  19:16  RGMII 50MHz clock divider ration
+ *  15     LHCLK clock generation/output enable control
+ *  14:12  LHCLK divider selection
+ *  11:8   APB Bus PCLK divider selection
+ *  7      Select PECI clock source
+ *  6      Select UART debug port clock source
+ *  5      Select UART6 clock source
+ *  4      Select UART5 clock source
+ *  3      Select UART4 clock source
+ *  2      Select UART3 clock source
+ *  1      Select UART2 clock source
+ *  0      Select UART1 clock source
+ */
+#define SCU_AST1030_CLK_GET_PCLK_DIV(x)                    (((x) >> 8) & 0xf)
+
 #endif /* ASPEED_SCU_H */
diff --git a/hw/misc/aspeed_scu.c b/hw/misc/aspeed_scu.c
index 150567f98a74..19b03471fc4e 100644
--- a/hw/misc/aspeed_scu.c
+++ b/hw/misc/aspeed_scu.c
@@ -235,6 +235,15 @@ static uint32_t 
aspeed_2600_scu_get_apb_freq(AspeedSCUState *s)
         / asc->apb_divider;
 }
 
+static uint32_t aspeed_1030_scu_get_apb_freq(AspeedSCUState *s)
+{
+    AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s);
+    uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]);
+
+    return hpll / (SCU_AST1030_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL4]) + 1)
+        / asc->apb_divider;
+}
+
 static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size)
 {
     AspeedSCUState *s = ASPEED_SCU(opaque);
@@ -482,6 +491,8 @@ static uint32_t aspeed_silicon_revs[] = {
     AST2600_A1_SILICON_REV,
     AST2600_A2_SILICON_REV,
     AST2600_A3_SILICON_REV,
+    AST1030_A0_SILICON_REV,
+    AST1030_A1_SILICON_REV,
 };
 
 bool is_supported_silicon_rev(uint32_t silicon_rev)
@@ -770,12 +781,64 @@ static const TypeInfo aspeed_2600_scu_info = {
     .class_init = aspeed_2600_scu_class_init,
 };
 
+static const uint32_t ast1030_a1_resets[ASPEED_AST2600_SCU_NR_REGS] = {
+    [AST2600_SYS_RST_CTRL]      = 0xFFC3FED8,
+    [AST2600_SYS_RST_CTRL2]     = 0x09FFFFFC,
+    [AST2600_CLK_STOP_CTRL]     = 0xFFFF7F8A,
+    [AST2600_CLK_STOP_CTRL2]    = 0xFFF0FFF0,
+    [AST2600_DEBUG_CTRL2]       = 0x00000000,
+    [AST2600_HPLL_PARAM]        = 0x10004077,
+    [AST2600_HPLL_EXT]          = 0x00000031,
+    [AST2600_CLK_SEL4]          = 0x43F90900,
+    [AST2600_CLK_SEL5]          = 0x40000000,
+    [AST2600_CHIP_ID0]          = 0xDEADBEEF,
+    [AST2600_CHIP_ID1]          = 0x0BADCAFE,
+};
+
+static void aspeed_ast1030_scu_reset(DeviceState *dev)
+{
+    AspeedSCUState *s = ASPEED_SCU(dev);
+    AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev);
+
+    memcpy(s->regs, asc->resets, asc->nr_regs * 4);
+
+    s->regs[AST2600_SILICON_REV] = AST1030_A1_SILICON_REV;
+    s->regs[AST2600_SILICON_REV2] = s->silicon_rev;
+    s->regs[AST2600_HW_STRAP1] = s->hw_strap1;
+    s->regs[AST2600_HW_STRAP2] = s->hw_strap2;
+    s->regs[PROT_KEY] = s->hw_prot_key;
+}
+
+static void aspeed_1030_scu_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass);
+
+    dc->desc = "ASPEED 1030 System Control Unit";
+    dc->reset = aspeed_ast1030_scu_reset;
+    asc->resets = ast1030_a1_resets;
+    asc->calc_hpll = aspeed_2600_scu_calc_hpll;
+    asc->get_apb = aspeed_1030_scu_get_apb_freq;
+    asc->apb_divider = 2;
+    asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS;
+    asc->clkin_25Mhz = true;
+    asc->ops = &aspeed_ast2600_scu_ops;
+}
+
+static const TypeInfo aspeed_1030_scu_info = {
+    .name = TYPE_ASPEED_1030_SCU,
+    .parent = TYPE_ASPEED_SCU,
+    .instance_size = sizeof(AspeedSCUState),
+    .class_init = aspeed_1030_scu_class_init,
+};
+
 static void aspeed_scu_register_types(void)
 {
     type_register_static(&aspeed_scu_info);
     type_register_static(&aspeed_2400_scu_info);
     type_register_static(&aspeed_2500_scu_info);
     type_register_static(&aspeed_2600_scu_info);
+    type_register_static(&aspeed_1030_scu_info);
 }
 
 type_init(aspeed_scu_register_types);
-- 
2.35.1