hw/ppc: SPI controller wiring to P10 chip

In this commit, create SPI controller on p10 chip and connect cs irq.

The QOM tree of pnv-spi and seeprom are.
/machine (powernv10-machine)
  /chip[0] (power10_v2.0-pnv-chip)
    /pib_spic[2] (pnv-spi)
      /pnv-spi-bus.2 (SSI)
      /xscom-spi[0] (memory-region)

/machine (powernv10-machine)
  /peripheral-anon (container)
    /device[0] (25csm04)
      /WP#[0] (irq)
      /ssi-gpio-cs[0] (irq)

(qemu) qom-get /machine/peripheral-anon /device[76] "parent_bus"
"/machine/chip[0]/pib_spic[2]/pnv-spi-bus.2"

Signed-off-by: Chalapathi V <chalapathi.v@linux.ibm.com>
Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

2 files changed, 28 insertions, 1 deletions

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index a3560d25b7..3526852685 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1962,6 +1962,11 @@ static void pnv_chip_power10_instance_init(Object *obj)
     for (i = 0; i < pcc->i2c_num_engines; i++) {
         object_initialize_child(obj, "i2c[*]", &chip10->i2c[i], TYPE_PNV_I2C);
     }
+
+    for (i = 0; i < PNV10_CHIP_MAX_PIB_SPIC; i++) {
+        object_initialize_child(obj, "pib_spic[*]", &chip10->pib_spic[i],
+                                TYPE_PNV_SPI);
+    }
 }
 
 static void pnv_chip_power10_quad_realize(Pnv10Chip *chip10, Error **errp)
@@ -2185,7 +2190,21 @@ static void pnv_chip_power10_realize(DeviceState *dev, Error **errp)
                               qdev_get_gpio_in(DEVICE(&chip10->psi),
                                                PSIHB9_IRQ_SBE_I2C));
     }
-
+    /* PIB SPI Controller */
+    for (i = 0; i < PNV10_CHIP_MAX_PIB_SPIC; i++) {
+        object_property_set_int(OBJECT(&chip10->pib_spic[i]), "spic_num",
+                                i, &error_fatal);
+        /* pib_spic[2] connected to 25csm04 which implements 1 byte transfer */
+        object_property_set_int(OBJECT(&chip10->pib_spic[i]), "transfer_len",
+                                (i == 2) ? 1 : 4, &error_fatal);
+        if (!sysbus_realize(SYS_BUS_DEVICE(OBJECT
+                                        (&chip10->pib_spic[i])), errp)) {
+            return;
+        }
+        pnv_xscom_add_subregion(chip, PNV10_XSCOM_PIB_SPIC_BASE +
+                                i * PNV10_XSCOM_PIB_SPIC_SIZE,
+                                &chip10->pib_spic[i].xscom_spic_regs);
+    }
 }
 
 static void pnv_rainier_i2c_init(PnvMachineState *pnv)
diff --git a/hw/ssi/pnv_spi.c b/hw/ssi/pnv_spi.c
index cdff3f9621..c1297ab733 100644
--- a/hw/ssi/pnv_spi.c
+++ b/hw/ssi/pnv_spi.c
@@ -1051,9 +1051,17 @@ static void operation_sequencer(PnvSpi *s)
 static void do_reset(DeviceState *dev)
 {
     PnvSpi *s = PNV_SPI(dev);
+    DeviceState *ssi_dev;
 
     trace_pnv_spi_reset();
 
+    /* Connect cs irq */
+    ssi_dev = ssi_get_cs(s->ssi_bus, 0);
+    if (ssi_dev) {
+        qemu_irq cs_line = qdev_get_gpio_in_named(ssi_dev, SSI_GPIO_CS, 0);
+        qdev_connect_gpio_out_named(DEVICE(s), "cs", 0, cs_line);
+    }
+
     /* Reset all N1 and N2 counters, and other constants */
     s->N2_bits = 0;
     s->N2_bytes = 0;