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Re: [Qemu-devel] [PATCH 4/9] m25p80: Introduce COLLECTING_VAR_LEN_DATA s
From: |
Cédric Le Goater |
Subject: |
Re: [Qemu-devel] [PATCH 4/9] m25p80: Introduce COLLECTING_VAR_LEN_DATA state. |
Date: |
Thu, 16 Jun 2016 10:13:31 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.8.0 |
On 06/16/2016 09:43 AM, Krzeminski, Marcin (Nokia - PL/Wroclaw) wrote:
>
>
>> -----Original Message-----
>> From: Cédric Le Goater [mailto:address@hidden
>> Sent: Thursday, June 16, 2016 9:14 AM
>> To: Krzeminski, Marcin (Nokia - PL/Wroclaw)
>> <address@hidden>; address@hidden
>> Cc: address@hidden; address@hidden;
>> address@hidden
>> Subject: Re: [PATCH 4/9] m25p80: Introduce COLLECTING_VAR_LEN_DATA
>> state.
>>
>> On 06/15/2016 03:41 PM, address@hidden wrote:
>>> From: Marcin Krzeminski <address@hidden>
>>>
>>> Some flash allows to stop read at any time.
>>> Allow framework to support this.
>>>
>>> Signed-off-by: Marcin Krzeminski <address@hidden>
>>> ---
>>> hw/block/m25p80.c | 5 +++++
>>> 1 file changed, 5 insertions(+)
>>>
>>> diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index
>>> 6910c52..ca1f882 100644
>>> --- a/hw/block/m25p80.c
>>> +++ b/hw/block/m25p80.c
>>> @@ -330,6 +330,7 @@ typedef enum {
>>> STATE_PAGE_PROGRAM,
>>> STATE_READ,
>>> STATE_COLLECTING_DATA,
>>> + STATE_COLLECTING_VAR_LEN_DATA,
>>> STATE_READING_DATA,
>>> } CMDState;
>>>
>>> @@ -872,6 +873,9 @@ static int m25p80_cs(SSISlave *ss, bool select)
>>> Flash *s = M25P80(ss);
>>>
>>> if (select) {
>>> + if (s->state == STATE_COLLECTING_VAR_LEN_DATA) {
>>> + complete_collecting_data(s);
>>> + }
>>
>> So for example, we could trigger an erase without a completed address ?
>>
>> C.
> Yes if you explicitly want that. This is new state and you need to go
> into it in decode_new_cmd.
> For now this is only used in WRSR command only.
OK. I see and I understand the use in that case.
Reviewed-by: Cédric Le Goater <address@hidden>
C.
>
> Thanks,
> Marcin
>>
>>> s->len = 0;
>>> s->pos = 0;
>>> s->state = STATE_IDLE;
>>> @@ -905,6 +909,7 @@ static uint32_t m25p80_transfer8(SSISlave *ss,
>> uint32_t tx)
>>> break;
>>>
>>> case STATE_COLLECTING_DATA:
>>> + case STATE_COLLECTING_VAR_LEN_DATA:
>>> s->data[s->len] = (uint8_t)tx;
>>> s->len++;
>>>
>