Hi Cedric, > Subject: Re: [PATCH v1 04/15] hw/i2c/aspeed: support discontinuous register > memory region of I2C bus > > On 7/18/24 08:49, Jamin Lin wrote: > > It only support continuous register memory region for all I2C bus. > > However, the register address of all I2c bus are discontinuous for > > AST2700. > > > > Ex: the register address of I2C bus for ast2700 as following. > > 0x100 - 0x17F: Device 0 > > 0x200 - 0x27F: Device 1 > > 0x300 - 0x37F: Device 2 > > 0x400 - 0x47F: Device 3 > > 0x500 - 0x57F: Device 4 > > 0x600 - 0x67F: Device 5 > > 0x700 - 0x77F: Device 6 > > 0x800 - 0x87F: Device 7 > > 0x900 - 0x97F: Device 8 > > 0xA00 - 0xA7F: Device 9 > > 0xB00 - 0xB7F: Device 10 > > 0xC00 - 0xC7F: Device 11 > > 0xD00 - 0xD7F: Device 12 > > 0xE00 - 0xE7F: Device 13 > > 0xF00 – 0xF7F: Device 14 > > 0x1000 – 0x107F: Device 15 > > > > Introduce a new class attribute to make user set each I2C bus gap size. > > Update formula to create all I2C bus register memory regions. > > I don't think this is necessary to model. Could we simply increase tge > register > MMIO size for the AST2700 bus model and rely on the memops to catch > invalid register offsets ? > Thanks for your review and suggestion.
Sorry, I am not very clearly understand your comments. Could you please describe it more detail? Thanks-Jamin > > Thanks, > > C. > > > > > > > Signed-off-by: Jamin Lin <jamin_...@aspeedtech.com> > > --- > > hw/i2c/aspeed_i2c.c | 3 ++- > > include/hw/i2c/aspeed_i2c.h | 1 + > > 2 files changed, 3 insertions(+), 1 deletion(-) > > > > diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c index > > 7d5a53c4c0..462ad78a13 100644 > > --- a/hw/i2c/aspeed_i2c.c > > +++ b/hw/i2c/aspeed_i2c.c > > @@ -1011,6 +1011,7 @@ static void aspeed_i2c_realize(DeviceState *dev, > Error **errp) > > SysBusDevice *sbd = SYS_BUS_DEVICE(dev); > > AspeedI2CState *s = ASPEED_I2C(dev); > > AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s); > > + uint32_t reg_offset = aic->reg_size + aic->reg_gap_size; > > > > sysbus_init_irq(sbd, &s->irq); > > memory_region_init_io(&s->iomem, OBJECT(s), > > &aspeed_i2c_ctrl_ops, s, @@ -1033,7 +1034,7 @@ static void > aspeed_i2c_realize(DeviceState *dev, Error **errp) > > return; > > } > > > > - memory_region_add_subregion(&s->iomem, aic->reg_size * (i + > offset), > > + memory_region_add_subregion(&s->iomem, reg_offset * (i + > > + offset), > > &s->busses[i].mr); > > } > > > > diff --git a/include/hw/i2c/aspeed_i2c.h b/include/hw/i2c/aspeed_i2c.h > > index 065b636d29..422ee0e298 100644 > > --- a/include/hw/i2c/aspeed_i2c.h > > +++ b/include/hw/i2c/aspeed_i2c.h > > @@ -275,6 +275,7 @@ struct AspeedI2CClass { > > > > uint8_t num_busses; > > uint8_t reg_size; > > + uint32_t reg_gap_size; > > uint8_t gap; > > qemu_irq (*bus_get_irq)(AspeedI2CBus *); > > ************* Email Confidentiality Notice ******************** 免責聲明: 本信件(或其附件)可能包含機密資訊,並受法律保護。如 台端非指定之收件者,請以電子郵件通知本電子郵件之發送者, 並請立即刪除本電子郵件及其附件和銷毀所有複印件。謝謝您的合作! DISCLAIMER: This message (and any attachments) may contain legally privileged and/or other confidential information. If you have received it in error, please notify the sender by reply e-mail and immediately delete the e-mail and any attachments without copying or disclosing the contents. Thank you.