ppc/pnv: Connect I2C controller model to powernv9 chip

Wires up three I2C controller instances to the powernv9 chip
XSCOM address space.

Each controller instance is wired up to a single I2C bus of
its own.  No other I2C devices are connected to the buses
at this time.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
[milesg: Split wiring from addition of model itself]
[milesg: Added new commit message]
[milesg: Moved hardcoded attributes into PnvChipClass]
[milesg: Removed TODO comment for I2C]
Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
Acked-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-ID: <20231016222013.3739530-3-milesg@linux.vnet.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index c0e34ff..bb4d00e 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -1432,6 +1432,10 @@ static void pnv_chip_power9_instance_init(Object *obj)
         object_initialize_child(obj, "pec[*]", &chip9->pecs[i],
                                 TYPE_PNV_PHB4_PEC);
     }
+
+    for (i = 0; i < pcc->i2c_num_engines; i++) {
+        object_initialize_child(obj, "i2c[*]", &chip9->i2c[i], TYPE_PNV_I2C);
+    }
 }
 
 static void pnv_chip_quad_realize_one(PnvChip *chip, PnvQuad *eq,
@@ -1504,6 +1508,7 @@ static void pnv_chip_power9_realize(DeviceState *dev, Error **errp)
     PnvChip *chip = PNV_CHIP(dev);
     Pnv9Psi *psi9 = &chip9->psi;
     Error *local_err = NULL;
+    int i;
 
     /* XSCOM bridge is first */
     pnv_xscom_init(chip, PNV9_XSCOM_SIZE, PNV9_XSCOM_BASE(chip));
@@ -1602,6 +1607,27 @@ static void pnv_chip_power9_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, local_err);
         return;
     }
+
+    /*
+     * I2C
+     */
+    for (i = 0; i < pcc->i2c_num_engines; i++) {
+        Object *obj =  OBJECT(&chip9->i2c[i]);
+
+        object_property_set_int(obj, "engine", i + 1, &error_fatal);
+        object_property_set_int(obj, "num-busses", pcc->i2c_num_ports,
+                                &error_fatal);
+        object_property_set_link(obj, "chip", OBJECT(chip), &error_abort);
+        if (!qdev_realize(DEVICE(obj), NULL, errp)) {
+            return;
+        }
+        pnv_xscom_add_subregion(chip, PNV9_XSCOM_I2CM_BASE +
+                               chip9->i2c[i].engine * PNV9_XSCOM_I2CM_SIZE,
+                                &chip9->i2c[i].xscom_regs);
+        qdev_connect_gpio_out(DEVICE(&chip9->i2c[i]), 0,
+                              qdev_get_gpio_in(DEVICE(&chip9->psi),
+                                               PSIHB9_IRQ_SBE_I2C));
+    }
 }
 
 static uint32_t pnv_chip_power9_xscom_pcba(PnvChip *chip, uint64_t addr)
@@ -1629,6 +1655,8 @@ static void pnv_chip_power9_class_init(ObjectClass *klass, void *data)
     k->xscom_pcba = pnv_chip_power9_xscom_pcba;
     dc->desc = "PowerNV Chip POWER9";
     k->num_pecs = PNV9_CHIP_MAX_PEC;
+    k->i2c_num_engines = PNV9_CHIP_MAX_I2C;
+    k->i2c_num_ports = PNV9_CHIP_MAX_I2C_PORTS;
 
     device_class_set_parent_realize(dc, pnv_chip_power9_realize,
                                     &k->parent_realize);
diff --git a/include/hw/ppc/pnv_chip.h b/include/hw/ppc/pnv_chip.h
index 53e1d92..90cfbad 100644
--- a/include/hw/ppc/pnv_chip.h
+++ b/include/hw/ppc/pnv_chip.h
@@ -9,6 +9,7 @@
 #include "hw/ppc/pnv_psi.h"
 #include "hw/ppc/pnv_sbe.h"
 #include "hw/ppc/pnv_xive.h"
+#include "hw/ppc/pnv_i2c.h"
 #include "hw/sysbus.h"
 
 OBJECT_DECLARE_TYPE(PnvChip, PnvChipClass,
@@ -86,6 +87,10 @@ struct Pnv9Chip {
 
 #define PNV9_CHIP_MAX_PEC 3
     PnvPhb4PecState pecs[PNV9_CHIP_MAX_PEC];
+
+#define PNV9_CHIP_MAX_I2C 3
+#define PNV9_CHIP_MAX_I2C_PORTS 1
+    PnvI2C      i2c[PNV9_CHIP_MAX_I2C];
 };
 
 /*
@@ -130,6 +135,9 @@ struct PnvChipClass {
     uint32_t     num_pecs;
     uint32_t     num_phbs;
 
+    uint32_t     i2c_num_engines;
+    uint32_t     i2c_num_ports;
+
     DeviceRealize parent_realize;
 
     uint32_t (*core_pir)(PnvChip *chip, uint32_t core_id);